The present disclosure discloses a door or window lock with a concealable handle, comprising: a handle component, a latch component, and a housing. The handle component includes a rotary handle and a concealing part. The rotary handle is provided with a mounting cavity. The concealing part is arranged at the bottom of the mounting cavity. The concealing part is fixed to the latch component and mounted inside the housing. The concealing part is configured to control the relative position of the rotary handle relative to the housing. The rotary handle is further provided with a lock core. The lock core is fixed inside the mounting cavity and located above the concealing part. The bottom of the lock core is engaged with the concealing part. When the rotary handle is pressed to be concealed in the housing, the lock core is adjusted by the concealing part to a locked state. When the lock core is in an unlocked state, the rotary handle is partially ejected out of the housing by the concealing part. This technical solution achieves the object of concealing the rotary handle by the cooperation of the rotary handle with the concealing part, thereby solving the problems of the prior art door locks with unconcealable handles which may be easily damaged or cause potential safety hazards.