diff --git a/cmd/main.go b/cmd/main.go
index 92e91e5..5d3031e 100644
--- a/cmd/main.go
+++ b/cmd/main.go
@@ -107,6 +107,10 @@ func (a *action) getConventionalCommits(c *cli.Context, commits []git.Commit) []
 	return conventionalCommits
 }
 
+func (a *action) generateMarkdown(c *cli.Context, commits []convention.Commit) error {
+	return nil
+}
+
 func (a *action) log(format string, v ...interface{}) {
 	if a.verbose {
 		log.Printf(format, v...)
diff --git a/pkg/changelog/markdown.go b/pkg/changelog/markdown.go
new file mode 100644
index 0000000..b3f53b6
--- /dev/null
+++ b/pkg/changelog/markdown.go
@@ -0,0 +1,81 @@
+package changelog
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/haunt98/changeloguru/pkg/convention"
+)
+
+const (
+	markdownTitle = "# CHANGELOG"
+
+	defaultLinesLen = 10
+)
+
+type MarkdownGenerator struct {
+	path    string
+	version string
+	t       time.Time
+}
+
+func NewMarkdownGenerator(path string, version string, t time.Time) *MarkdownGenerator {
+	return &MarkdownGenerator{
+		path:    path,
+		version: version,
+		t:       t,
+	}
+}
+
+func (g *MarkdownGenerator) Generate(commits []convention.Commit) error {
+	return nil
+}
+
+func (g *MarkdownGenerator) getLines(commits []convention.Commit) []string {
+	if len(commits) == 0 {
+		return nil
+	}
+
+	lines := make([]string, 0, defaultLinesLen)
+	lines = append(lines, markdownTitle)
+
+	lines = append(lines, g.composeVersionHeader())
+
+	addedLines := make([]string, 0, defaultLinesLen)
+	fixedLines := make([]string, 0, defaultLinesLen)
+	othersLines := make([]string, 0, defaultLinesLen)
+
+	for _, commit := range commits {
+		t := getType(commit.Type)
+		switch t {
+		case addedType:
+			addedLines = append(addedLines, commit.RawHeader)
+		case fixedType:
+			fixedLines = append(fixedLines, commit.RawHeader)
+		case othersType:
+			othersLines = append(othersLines, commit.RawHeader)
+		default:
+			continue
+		}
+	}
+
+	lines = append(lines, g.composeTypeHeader(addedType))
+	lines = append(lines, addedLines...)
+
+	lines = append(lines, g.composeTypeHeader(fixedType))
+	lines = append(lines, fixedLines...)
+
+	lines = append(lines, g.composeTypeHeader(othersType))
+	lines = append(lines, othersLines...)
+
+	return lines
+}
+
+func (g *MarkdownGenerator) composeVersionHeader() string {
+	year, month, day := g.t.Date()
+	return fmt.Sprintf("# %s (%d-%d-%d)", g.version, year, month, day)
+}
+
+func (g *MarkdownGenerator) composeTypeHeader(t string) string {
+	return fmt.Sprintf("## %s", t)
+}
diff --git a/pkg/changelog/markdown_test.go b/pkg/changelog/markdown_test.go
new file mode 100644
index 0000000..ffd9d94
--- /dev/null
+++ b/pkg/changelog/markdown_test.go
@@ -0,0 +1,92 @@
+package changelog
+
+import (
+	"testing"
+	"time"
+
+	"github.com/haunt98/changeloguru/pkg/convention"
+	"github.com/sebdah/goldie/v2"
+)
+
+func TestMarkdownGeneratorGetLines(t *testing.T) {
+	tests := []struct {
+		name    string
+		commits []convention.Commit
+	}{
+		{
+			name: "empty",
+		},
+		{
+			name: "1 commit feat",
+			commits: []convention.Commit{
+				{
+					RawHeader:   "feat: description",
+					Type:        convention.FeatType,
+					Scope:       "",
+					Description: "description",
+				},
+			},
+		},
+		{
+			name: "1 commit fixed",
+			commits: []convention.Commit{
+				{
+					RawHeader:   "fix: description",
+					Type:        convention.FixType,
+					Scope:       "",
+					Description: "description",
+				},
+			},
+		},
+		{
+			name: "1 commit other",
+			commits: []convention.Commit{
+				{
+					RawHeader:   "ci: description",
+					Type:        convention.CiType,
+					Scope:       "",
+					Description: "description",
+				},
+			},
+		},
+		{
+			name: "mixed",
+			commits: []convention.Commit{
+				{
+					RawHeader:   "feat: description feat",
+					Type:        convention.FeatType,
+					Scope:       "",
+					Description: "description feat",
+				},
+				{
+					RawHeader:   "fix: description fix",
+					Type:        convention.FixType,
+					Scope:       "",
+					Description: "description fix",
+				},
+				{
+					RawHeader:   "ci: description ci",
+					Type:        convention.CiType,
+					Scope:       "",
+					Description: "description ci",
+				},
+				{
+					RawHeader:   "build: description build",
+					Type:        convention.BuildType,
+					Scope:       "",
+					Description: "description build",
+				},
+			},
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			g := goldie.New(t)
+
+			generator := NewMarkdownGenerator("path", "v1.0.0", time.Time{})
+			lines := generator.getLines(tc.commits)
+			g.AssertJson(t, t.Name(), lines)
+		})
+	}
+}
diff --git a/pkg/changelog/testdata/TestMarkdownGeneratorGetLines/1_commit_feat.golden b/pkg/changelog/testdata/TestMarkdownGeneratorGetLines/1_commit_feat.golden
new file mode 100644
index 0000000..f9ecdc6
--- /dev/null
+++ b/pkg/changelog/testdata/TestMarkdownGeneratorGetLines/1_commit_feat.golden
@@ -0,0 +1,8 @@
+[
+  "# CHANGELOG",
+  "# v1.0.0 (1-1-1)",
+  "## Added",
+  "feat: description",
+  "## Fixed",
+  "## Others"
+]
\ No newline at end of file
diff --git a/pkg/changelog/testdata/TestMarkdownGeneratorGetLines/1_commit_fixed.golden b/pkg/changelog/testdata/TestMarkdownGeneratorGetLines/1_commit_fixed.golden
new file mode 100644
index 0000000..fc549e0
--- /dev/null
+++ b/pkg/changelog/testdata/TestMarkdownGeneratorGetLines/1_commit_fixed.golden
@@ -0,0 +1,8 @@
+[
+  "# CHANGELOG",
+  "# v1.0.0 (1-1-1)",
+  "## Added",
+  "## Fixed",
+  "fix: description",
+  "## Others"
+]
\ No newline at end of file
diff --git a/pkg/changelog/testdata/TestMarkdownGeneratorGetLines/1_commit_other.golden b/pkg/changelog/testdata/TestMarkdownGeneratorGetLines/1_commit_other.golden
new file mode 100644
index 0000000..8034677
--- /dev/null
+++ b/pkg/changelog/testdata/TestMarkdownGeneratorGetLines/1_commit_other.golden
@@ -0,0 +1,8 @@
+[
+  "# CHANGELOG",
+  "# v1.0.0 (1-1-1)",
+  "## Added",
+  "## Fixed",
+  "## Others",
+  "ci: description"
+]
\ No newline at end of file
diff --git a/pkg/changelog/testdata/TestMarkdownGeneratorGetLines/empty.golden b/pkg/changelog/testdata/TestMarkdownGeneratorGetLines/empty.golden
new file mode 100644
index 0000000..ec747fa
--- /dev/null
+++ b/pkg/changelog/testdata/TestMarkdownGeneratorGetLines/empty.golden
@@ -0,0 +1 @@
+null
\ No newline at end of file
diff --git a/pkg/changelog/testdata/TestMarkdownGeneratorGetLines/mixed.golden b/pkg/changelog/testdata/TestMarkdownGeneratorGetLines/mixed.golden
new file mode 100644
index 0000000..a9d1e44
--- /dev/null
+++ b/pkg/changelog/testdata/TestMarkdownGeneratorGetLines/mixed.golden
@@ -0,0 +1,11 @@
+[
+  "# CHANGELOG",
+  "# v1.0.0 (1-1-1)",
+  "## Added",
+  "feat: description feat",
+  "## Fixed",
+  "fix: description fix",
+  "## Others",
+  "ci: description ci",
+  "build: description build"
+]
\ No newline at end of file
diff --git a/pkg/changelog/types.go b/pkg/changelog/types.go
new file mode 100644
index 0000000..0166f0a
--- /dev/null
+++ b/pkg/changelog/types.go
@@ -0,0 +1,20 @@
+package changelog
+
+import "github.com/haunt98/changeloguru/pkg/convention"
+
+const (
+	addedType  = "Added"
+	fixedType  = "Fixed"
+	othersType = "Others"
+)
+
+func getType(conventionType string) string {
+	switch conventionType {
+	case convention.FeatType:
+		return addedType
+	case convention.FixType:
+		return fixedType
+	default:
+		return othersType
+	}
+}
diff --git a/pkg/convention/types.go b/pkg/convention/types.go
new file mode 100644
index 0000000..c7f6604
--- /dev/null
+++ b/pkg/convention/types.go
@@ -0,0 +1,14 @@
+package convention
+
+const (
+	FixType      = "fix"
+	FeatType     = "feat"
+	BuildType    = "build"
+	ChoreType    = "chore"
+	CiType       = "ci"
+	DocsType     = "docs"
+	StyleType    = "style"
+	RefactorType = "refactor"
+	PerfType     = "perf"
+	TestType     = "test"
+)