diff --git a/compiler/erg_common/python_util.rs b/compiler/erg_common/python_util.rs
index 74c11d4f..4d844747 100644
--- a/compiler/erg_common/python_util.rs
+++ b/compiler/erg_common/python_util.rs
@@ -6,7 +6,7 @@ use std::process::Command;
 use crate::serialize::get_magic_num_from_bytes;
 
 #[cfg(unix)]
-pub const BUILTIN_PYTHON_MODS: [&str; 14] = [
+pub const BUILTIN_PYTHON_MODS: [&str; 15] = [
     "glob",
     "http",
     "importlib",
@@ -19,11 +19,12 @@ pub const BUILTIN_PYTHON_MODS: [&str; 14] = [
     "socket",
     "subprocess",
     "sys",
+    "tarfile",
     "time",
     "urllib",
 ];
 #[cfg(not(unix))]
-pub const BUILTIN_PYTHON_MODS: [&str; 13] = [
+pub const BUILTIN_PYTHON_MODS: [&str; 14] = [
     "glob",
     "http",
     "importlib",
@@ -35,6 +36,7 @@ pub const BUILTIN_PYTHON_MODS: [&str; 13] = [
     "socket",
     "subprocess",
     "sys",
+    "tarfile",
     "time",
     "urllib",
 ];
diff --git a/compiler/erg_compiler/lib/pystd/tarfile.d.er b/compiler/erg_compiler/lib/pystd/tarfile.d.er
new file mode 100644
index 00000000..8de2091c
--- /dev/null
+++ b/compiler/erg_compiler/lib/pystd/tarfile.d.er
@@ -0,0 +1,10 @@
+.TarFile!: ClassType
+.TarFile!.open!: (path: PathLike or NoneType := NoneType, mode := Str) => .TarFile!
+.TarFile!.add!: (self: RefMut(.TarFile!), name: PathLike, arcname: PathLike or NoneType := NoneType, recursive := Bool) => NoneType
+.TarFile!.close!: (self: .TarFile!,) => NoneType
+.TarFile!.extractall!: (self: RefMut(.TarFile!), path := PathLike, members: [Str; _] or NoneType := NoneType, numeric_owner := Bool) => NoneType
+.TarFile!.getnames: (self: Ref(.TarFile!),) -> [Str; _]
+.TarFile!.list: (self: Ref(.TarFile!), verbose := Bool) -> [Str; _]
+
+.open!: (path: PathLike or NoneType := NoneType, mode := Str) => .TarFile!
+.is_tarfile: (name: Str or File!,) -> Bool