A lock that can be locked on only one side for an inner door of a building, - with a support for mounting on or in the inner door, - with a catch bolt adjustably arranged on the support, which can be adjusted between a closed extended position with respect to the support and an open retracted position with respect to the support, - with a driver device arranged on the support for actuating the catch bolt, which comprises an outer connection for the torque-transmitting connection of the driver device to an outer handle associated with a non-lockable outside of the inner door and an inner connection for the torque-transmitting connection of the driver device to an inner handle associated with a lockable inside of the inner door, - with a locking device that can be adjusted by means of a bolt element between an unlocking state and a locking state, - wherein the driver device comprises a force-transmitting outer path leading from the outer connection to the catch bolt, which is continuous in the unlocking state of the locking device so that a force can be transmitted over the outer path from the outer connection to the catch bolt so as to move the catch bolt from the closed position to the open position, - wherein the driver device comprises a force-transmitting inner path leading from the inner connection to the catch bolt, which is continuous in the unlocking state of the locking device so that a force can be transmitted over the inner path from the inner connection to the catch bolt so as to move the catch bolt from the closed position to the open position, - wherein the locking device in the locking state interrupts the outer path so that no force can be transmitted by the outer connection to the catch bolt so as to move the catch bolt from the closed position to the open position, characterised by a coupling device for coupling the catch bolt to the locking device in such a way that a movement of the catch bolt from the closed position to the open position forces a movement of the locking device from the locking state to the unlocking state. - with a support for mounting on or in the inner door, - with a catch bolt adjustably arranged on the support, which can be adjusted between a closed extended position with respect to the support and an open retracted position with respect to the support, - with a driver device arranged on the support for actuating the catch bolt, which comprises an outer connection for the torque-transmitting connection of the driver device to an outer handle associated with a non-lockable outside of the inner door and an inner connection for the torque-transmitting connection of the driver device to an inner handle associated with a lockable inside of the inner door, - with a locking device that can be adjusted by means of a bolt element between an unlocking state and a locking state, - wherein the driver device comprises a force-transmitting outer path leading from the outer connection to the catch bolt, which is continuous in the unlocking state of the locking device so that a force can be transmitted over the outer path from the outer connection to the catch bolt so as to move the catch bolt from the closed position to the open position, - wherein the driver device comprises a force-transmitting inner path leading from the inner connection to the catch bolt, which is continuous in the unlocking state of the locking device so that a force can be transmitted over the inner path from the inner connection to the catch bolt so as to move the catch bolt from the closed position to the open position, - wherein the locking device in the locking state interrupts the outer path so that no force can be transmitted by the outer connection to the catch bolt so as to move the catch bolt from the closed position to the open position,