how can connect joystick to arduino?

i have a MaxFighter F-16 old joystick ( Serial port not a USB) like this image : joystick.png in my attached file
and i don’t know how can connected it to arduino

joystick.png

Welcome to the forum.
You can use an Arduino Leonardo board, that board is able to emulate a mouse.
I read that also a usb joystick is possible, but I don't know how well that works : http://www.imaginaryindustries.com/blog/?p=80
An Arduino has analog inputs, those are used to read the analog joysticks.

This is a modern joystick, with Arduino Leonardo: http://arduino.cc/en/Tutorial/JoystickMouseControl
This is with an old analog joystick, but sadly not with a Leonardo: http://www.arduino.cc/en/Tutorial/JoyStick