Abstract: A suitcase lock includes a housing forming a slot. A link bar is mounted to inside of the housing. A lid is mounted to an inner open side of the housing by the link bar pivoted to the lid. A push switch, a rotor, and a hook block are arranged on the lid. The assembled lock is mounted to a suitcase so that the hook block may engage a counterpart hook formed in an upper shell of the suitcase and a pawl of the push switch engages the lid and the rotor is set at a position abutting against the push switch to thereby prevent the upper shell from opening. When the rotor is operated so as to not abut against the push switch, the push switch is inward depressible to disengage the pawls from each other, to thereby allow the upper shell to be opened.