diff --git a/1_Fib/fib.js b/1_Fib/fib.js
new file mode 100644
index 0000000..f60abc4
--- /dev/null
+++ b/1_Fib/fib.js
@@ -0,0 +1,5 @@
+function fibonacci(num) {
+  if (num <= 1) return 1;
+
+  return fibonacci(num - 1) + fibonacci(num - 2);
+}