An elastic press-lock structure has a ring-shaped member and a connection assembly. The ring-shaped member is defined an elongated hole. The connection assembly is passed through the elongated hole of the ring-shaped member and detachably connected with the ring-shaped member. The connection assembly is pressed with a pressing force to deflect toward a first direction with an axle which is a predetermined position of the elongated hole so that the connection assembly is limited by the ring-shaped member which is deformed and the then the connection assembly is reset toward a second direction opposite to the first direction by a restoring force generated by the connection assembly while the pressing force is released.