Abstract: A medicament delivery device includes a housing having distal and proximal ends along a longitudinal axis. The housing is arranged to accommodate a medicament container and a delivery member connected to the container; a reloadable drive mechanism for acting on an accommodated container; a delivery member cover at the proximal end and slidable in relation to the housing along the axis; and a cover lock mechanism that includes a first lock member on an actuator movably arranged in relation to the housing and a second lock member on the cover. The first lock member engages the second lock member to block movement of the cover, and the actuator is movable in relation to the cover such that manually actuating the actuator generally transverse to the axis causes the first lock member to be moved out of engagement with the second lock member, thereby allowing the cover to be moved.