Disclosed is a safety syringe capable of preventing needle-stick injuries, filtering foreign matters in a fluid, and preventing reuse thereof. The safety syringe includes: a safety needle part provided with a safety cap, the safety cap being configured to pop out by an elastic force of an elastic body connected thereto when the safety cap is unlatched and to be fixed while surrounding a needle tip; a filter part being configured such that a first end thereof is coupled with the safety needle part, and filtering fluid introduced or discharged through the needle; and a main body part being configured such that a first end thereof is coupled with the filter part, and having a barrel with a piston mounted therein, the piston being provided at a fore end thereof with an insertion part pushing out the fluid by being inserted into a luer of the syringe.