The invention concerns an arrangement for securing a lift car (1 ) that is part of an electrically driven lift at a predetermined level for, for example, service or maintenance, and for preventing unintentional motion of the lift car secured in this manner, whereby the lift car may be of the type that is arranged with a cage or platform for the transport of persons or material. In order to be able to stop the lift car immediately from the platform or cage of the lift car and essentially prevent unintentional driving of the lift car when it is located secured at a certain level, the arrangement comprises: a restraining arrangement comprising a restraint (13) that is supported by the lift car (1 ) arranged such that it can be placed into and removed from restraining interaction with an extended stationary interaction element (7) arranged to extend along the vertical pathway of the lift car, and which restraint when placed into restraining interaction locks the lift car to the stationary interaction element, a power-interruption device (31 ) that can be placed into and removed from a power- interrupting position whereby the power to a driving motor unit (8) that is part of the lift is interrupted when the power-interruption device is placed arranged in its power-interrupting position, in which the power-interruption device (31 ) is so arranged at the restraining arrangement (13, 7) that the said power-interruption device is located in its power- interrupting position when the restraint (13) has been set into restraining interaction with the extended stationary interaction element (7).