Lock for doors and/or windows, comprising: - a box body; - at least a closing element housed inside the box body and mobile at least between an extracted configuration from the box body and a retracted configuration in the box body; - an actuator member kinematically connected to the closing element for activating a displacement thereof between the extracted and retracted configurations, said actuator member being mobile in rotation between at least two operating positions which respectively correspond to the above-said configurations of the closing element; - a control member kinematically connected to said actuator member and mobile along a translation direction between at least two operating positions which respectively correspond to the operating positions of the actuator organ, which in turn correspond to the extracted and retracted configurations of the closing element, said control member being solidly constrained to a cam having an at least partly helical extension and in which a cam follower element is slidably inserted, solidly constrained to the actuator member, so that the translation movement of the control member is converted into a rotating movement of the actuator member by effect of the sliding of the cam follower element inside the cam; said control member having at least a groove that is longitudinal and parallel to the translation direction of the control member, a tooth (43, 45) being inserted slidably inside said longitudinal groove, which tooth is solidly constrained to the box body; - a first bushing fixed to the box body and provided with a seating from which a first tooth projects; the lock being characterized in that it further comprises: - a second bushing fixed to the box body and positioned on an opposite side to said first bushing with respect to said box body, said second bushing being provided with a seating from which a second tooth projects, said bushings (42, 44) being reciprocally fixed and fixed on said box body for maintaining the control member in an engaging condition on the box body, wherein said control member inserts in the seating of both the bushings (42, 44), crossing the box body so that said first and second tooth (43, 45) are slidably inserted in said longitudinal groove of the control member. - a box body; - at least a closing element housed inside the box body and mobile at least between an extracted configuration from the box body and a retracted configuration in the box body; - an actuator member kinematically connected to the closing element for activating a displacement thereof between the extracted and retracted configurations, said actuator member being mobile in rotation between at least two operating positions which respectively correspond to the above-said configurations of the closing element; - a control member kinematically connected to said actuator member and mobile along a translation direction between at least two operating positions which respectively correspond to the operating positions of the actuator organ, which in turn correspond to the extracted and retracted configurations of the closing element, said control member being solidly constrained to a cam having an at least partly helical extension and in which a cam follower element is slidably inserted, solidly constrained to the actuator member, so that the translation movement of the control member is converted into a rotating movement of the actuator member by effect of the sliding of the cam follower element inside the cam; said control member having at least a groove that is longitudinal and parallel to the translation direction of the control member, a tooth (43, 45) being inserted slidably inside said longitudinal groove, which tooth is solidly constrained to the box body; - a first bushing fixed to the box body and provided with a seating from which a first tooth projects; - a second bushing fixed to the box body and positioned on an opposite side to said first bushing with respect to said box body, said second bushing being provided with a seating from which a second tooth projects, said bushings (42, 44) being reciprocally fixed and fixed on said box body for maintaining the control member in an engaging condition on the box body, wherein said control member inserts in the seating of both the bushings (42, 44), crossing the box body so that said first and second tooth (43, 45) are slidably inserted in said longitudinal groove of the control member.