diff --git a/tmux/pane.go b/tmux/pane.go
new file mode 100644
index 0000000..62cda58
--- /dev/null
+++ b/tmux/pane.go
@@ -0,0 +1,7 @@
+package tmux
+
+type Pane struct {
+	Root     string   `yaml:"root,omitempty"`
+	Type     string   `yaml:"type,omitempty"`
+	Commands []string `yaml:"commands,omitempty"`
+}
diff --git a/tmux/tmux.go b/tmux/tmux.go
index c11fe4e..a532bf0 100644
--- a/tmux/tmux.go
+++ b/tmux/tmux.go
@@ -9,6 +9,11 @@ import (
 	"syscall"
 )
 
+const (
+	VerticalSplit   = "vertical"
+	HorizontalSplit = "horizontal"
+)
+
 type Tmux struct {
 	BinPath string
 	Debug   bool
@@ -51,6 +56,24 @@ func (t *Tmux) Attach(name string) error {
 	return nil
 }
 
+func (t *Tmux) SendKeys(target string, command string) error {
+	_, err := t.Exec("send-keys", "-t", target, command, "Enter")
+	return err
+}
+
+func (t *Tmux) SplitWindow(target string, split string, root string) error {
+	args := []string{"split-window"}
+	switch split {
+	case VerticalSplit:
+		args = append(args, "-v")
+	case HorizontalSplit:
+		args = append(args, "-h")
+	}
+	args = append(args, "-t", target, "-c", root)
+	_, err := t.Exec(args...)
+	return err
+}
+
 func (t *Tmux) ListSessions() ([]string, error) {
 	sessions := []string{}
 	result, err := t.Exec("ls", "-F", "#{session_name}")
diff --git a/tmux/window.go b/tmux/window.go
index c669ed5..92eae4f 100644
--- a/tmux/window.go
+++ b/tmux/window.go
@@ -9,16 +9,29 @@ type Window struct {
 	Root     string   `yaml:"root,omitempty"`
 	Commands []string `yaml:"commands,omitempty"`
 	ID       string   `yaml:"-"`
+	Panes    []Pane   `yaml:"panes,omitempty"`
 }
 
 func (w *Window) Create(tmux *Tmux) {
 	tmux.Run("new-window", "-t", w.ID, "-n", w.Name, "-c", w.Root)
+
+	for i, pane := range w.Panes {
+		if i > 0 {
+			err := tmux.SplitWindow(w.ID, pane.Type, w.Root)
+			if err != nil {
+				panic(err)
+			}
+		}
+
+		if len(pane.Commands) > 0 {
+			tmux.SendKeys(w.ID, strings.Join(pane.Commands, ";"))
+		}
+	}
 }
 
 func (w *Window) SendCommands(tmux *Tmux) {
 	if len(w.Commands) > 0 {
-		tmux.Run("send-keys", "-t", w.ID, strings.Join(w.Commands, ";"))
-		tmux.Run("send-keys", "-t", w.ID, "Enter")
+		tmux.SendKeys(w.ID, strings.Join(w.Commands, ";"))
 	}
 }