The present invention relates to a kind of dose counters. In particular, but be not limited to, the present invention relates to a kind of metered dose inhalers that dose counter uses (MDI). Dose counter includes a revolution meter (26) and actuator (2). Actuator (2) can form position of the element revolution meter (26) that is engageable and being detached from the characteristic (33) with complementation when between actuator (2) mobile first and second including a part of (17) relative to revolution meter unit (26). When actuator (2) and the element revolution meter (26) of complementary characteristic (33) of moulding section (17), rotating member revolution meter (26) is resistant to.
