diff --git a/src/builtin.rs b/src/builtin.rs
index 557925c..b39f867 100644
--- a/src/builtin.rs
+++ b/src/builtin.rs
@@ -14,6 +14,8 @@ mod pwd;
 /// removes files
 mod rm;
 
+mod mkdir;
+
 /// the butt of a file
 mod tail;
 
@@ -32,6 +34,7 @@ pub enum Builtin {
     Changedir,
     Echo,
     Ls,
+    Mkdir,
     Printenv,
     Pwd,
     Rm,
@@ -46,6 +49,7 @@ impl Builtin {
             Changedir => &cd::Changedir,
             Echo => &echo::Echo,
             Ls => &ls::Ls,
+            Mkdir => &mkdir::Mkdir,
             Printenv => &printenv::Printenv,
             Pwd => &pwd::Pwd,
             Rm => &rm::Rm,
@@ -68,6 +72,7 @@ pub fn all() -> HashMap<&'static str, Builtin> {
         ("cd", Changedir),
         ("echo", Echo),
         ("ls", Ls),
+        ("mkdir", Mkdir),
         ("printenv", Printenv),
         ("pwd", Pwd),
         ("rm", Rm),
diff --git a/src/builtin/mkdir.rs b/src/builtin/mkdir.rs
new file mode 100644
index 0000000..3b636ce
--- /dev/null
+++ b/src/builtin/mkdir.rs
@@ -0,0 +1,25 @@
+use crate::{
+    error::ExecError,
+    run::{Call, Context, Value},
+};
+use std::{env, fs, io::Write};
+
+pub struct Mkdir;
+
+impl Call for Mkdir {
+    fn call(&self, ctx: &mut Context, args: &[Value]) -> Result<Value, ExecError> {
+        match args.len() {
+            0 => {
+                todo!()
+            }
+            1 => {
+                let path = args[0].try_as_str()?;
+                fs::create_dir(path)?;
+            }
+            _ => {
+                todo!()
+            }
+        }
+        Ok(Value::None)
+    }
+}