A drive assembly for a medication delivery device being switchable from an operational state to a resetting state and comprising: - a housing having a proximal end and a distal end, - a drive member adapted to be rotated with respect to the housing and to act on a piston rod during the operational state, thereby causing a movement of the piston rod in distal direction for delivery of a dose of medication, - a stop member, and - a resilient member adapted to provide a force for engagement of the stop member and the drive member in the operational state, the resilient member being adapted to interact with a medication receptacle of a medication delivery device such that - when a respective medication receptacle is engaged with the housing the resilient member is strained, thereby providing the corresponding force, and - when a respective medication receptacle is disengaged from the housing the resilient member is unstrained, thereby not providing the corresponding force, wherein - in the operational state of the drive assembly the stop member is engaged with the drive member, the stop member preventing rotational movement of the drive member in a first direction with respect to the housing and permitting rotational movement of the drive member in a second direction with respect to the housing, the second direction being opposite to the first direction, - in a predetermined position of the drive assembly the stop member is enabled to disengage from the drive member caused by gravity due to the weight of the stop member for switching into the resetting state of the drive assembly, and - in the resetting state of the drive assembly the stop member and the drive member are disengaged such that the drive assembly becomes resettable and a resetting movement of the drive member in the first direction can be performed. - a housing having a proximal end and a distal end, - a drive member adapted to be rotated with respect to the housing and to act on a piston rod during the operational state, thereby causing a movement of the piston rod in distal direction for delivery of a dose of medication, - a stop member, and - a resilient member adapted to provide a force for engagement of the stop member and the drive member in the operational state, the resilient member being adapted to interact with a medication receptacle of a medication delivery device such that - when a respective medication receptacle is engaged with the housing the resilient member is strained, thereby providing the corresponding force, and - when a respective medication receptacle is disengaged from the housing the resilient member is unstrained, thereby not providing the corresponding force, wherein - in the operational state of the drive assembly the stop member is engaged with the drive member, the stop member preventing rotational movement of the drive member in a first direction with respect to the housing and permitting rotational movement of the drive member in a second direction with respect to the housing, the second direction being opposite to the first direction, - in a predetermined position of the drive assembly the stop member is enabled to disengage from the drive member caused by gravity due to the weight of the stop member for switching into the resetting state of the drive assembly, and - in the resetting state of the drive assembly the stop member and the drive member are disengaged such that the drive assembly becomes resettable and a resetting movement of the drive member in the first direction can be performed.