The present disclosure relates to a safety mechanism for a medicament delivery device for mechanical shock absorption, which safety mechanism has a medicament delivery member sleeve, a housing having a proximal opening arranged to receive the medicament delivery member sleeve, wherein the medicament delivery member sleeve is axially displaceable inside the housing, between an extended position in which a proximal end portion of the medicament delivery member sleeve extends proximally from the housing and a retracted position in which the proximal end portion is received by the housing, wherein the proximal end portion has a resilient structure, enabling compression of the proximal end portion in the distal direction upon impact of an axial force greater than a threshold value.