PROBLEM TO BE SOLVED: To provide a distribution device which prevents individual constituents from being unexpectedly distributed or mixed and allows a blocking member to freely move between an opening position and a blocking position.SOLUTION: The distribution device which mixes and distributes composite component materials includes: a composite component cartridge 1 having a plurality of chambers 2, 3; a mixer member having a longitudinal axis line; and a mixer housing 10 which can be arranged on the mixer member. Each chamber has a distribution aperture which can be blocked by a blocking member fixed to the mixer housing 10. The mixer housing 10 is connected, by a connecting member, to the cartridge 1 and movable in an axial direction. The connecting member is a rotational member 20 and has cooperative action members which are constituted so that the rotational member 20, the mixer housing 10 and the cartridge 1 may generate relative movements in the axial direction between the mixer housing 10 and the cartridge 1 by means of the rotation of the rotational member 20.