An elevator comprising an elevator car comprising a cabin box provided with a floor, a roof, walls and preferably also door(s) each delimiting an interior space for receiving a load to be transported with the elevator car; at least two landings (7,8); a motor for moving the elevator car; a control system (10, 11"',11"",11""') for controlling the motor; wherein the control system (10, 11-11""') is provided with an automatic control mode and a manual control mode, in which automatic control mode the motor is arranged to be automatically controlled by the control system (10, 11 "'-11 ""') to move the elevator car automatically from one landing to another, and in which manual control mode the motor is arranged to be manually controllable to move the elevator car a manually controllable distance upwards or downwards; an operating unit (11"',11"",11""') for said manual control, the operating unit (11"',11"",11""') being mounted on the elevator car and comprising operating means (12"',12"",12""') operable manually by a user for said manual control, wherein the elevator car comprises a blocking means (13"',13"",13""') operable by a user positioned inside said interior space, the state of the blocking means (13"',13"",13""') being changeable between a blocking state and an unblocking state, in which blocking state the blocking means (13"',13"",13""') block operation of the operating means (12"',12"",12""') for said manual control by a user positioned inside said interior space, and in which unblocking state the blocking means (13"',13"",13""') allow operation of the operating means (12"',12"",12'"') for said manual control by a user positioned inside said interior space, the operating unit (11'",11 "",11""') being positioned such that the operating means (12"',12"",12""') thereof are operable by a user positioned inside said interior space after operation of the blocking means (13"',13"",13""') to change their state from blocking state to said unblocking state, characterized in that the blocking means (13"'-13""') comprises a lock (18"'-18""') for locking the blocking means (13"'-13""') in the blocking state, said lock (18"'-18""') being openable with a key, in particular with a mechanical key, an electronic key, or a code key, and in that the operating means (12"', 12"", 12""') are formed by buttons of a button panel mounted on the car for being used in the automatic control mode for receiving car calls from a passenger. an elevator car comprising a cabin box provided with a floor, a roof, walls and preferably also door(s) each delimiting an interior space for receiving a load to be transported with the elevator car; at least two landings (7,8); a motor for moving the elevator car; a control system (10, 11"',11"",11""') for controlling the motor; wherein the control system (10, 11-11""') is provided with an automatic control mode and a manual control mode, in which automatic control mode the motor is arranged to be automatically controlled by the control system (10, 11 "'-11 ""') to move the elevator car automatically from one landing to another, and in which manual control mode the motor is arranged to be manually controllable to move the elevator car a manually controllable distance upwards or downwards; an operating unit (11"',11"",11""') for said manual control, the operating unit (11"',11"",11""') being mounted on the elevator car and comprising operating means (12"',12"",12""') operable manually by a user for said manual control, wherein the elevator car comprises a blocking means (13"',13"",13""') operable by a user positioned inside said interior space, the state of the blocking means (13"',13"",13""') being changeable between a blocking state and an unblocking state, wherein the elevator car comprises a blocking means (13"',13"",13""') operable by a user positioned inside said interior space, the state of the blocking means (13"',13"",13""') being changeable between a blocking state and an unblocking state, in which blocking state the blocking means (13"',13"",13""') block operation of the operating means (12"',12"",12""') for said manual control by a user positioned inside said interior space, and in which unblocking state the blocking means (13"',13"",13""') allow operation of the operating means (12"',12"",12'"') for said manual control by a user positioned inside said interior space, the operating unit (11'",11 "",11""') being positioned such that the operating means (12"',12"",12""') thereof are operable by a user positioned inside said interior space after operation of the blocking means (13"',13"",13""') to change their state from blocking state to said unblocking state,