A testing stylus used for testing a keyboard, includes a sleeve, a resisting member and an elastic member, the resisting member be conductive and have an engageable end and an opposite resisting end, the resisting end is used to resist against the keyboard. The resisting member and the elastic member are assembled in the sleeve, the elastic member resists against the engageable end, to allow the resisting end to be exposed to the outside from the sleeve, the resisting end is withdrawn into the sleeve by pressing the sleeve.