An air conditioner (1) is equipped with a sub-heat exchange unit (41) and a main heat exchange unit (31). A sub-side engagement section (46) is provided on a sub-plate (43) of the sub-heat exchange unit (41) to protrude away from the sub-fins (42) of the sub-heat exchange unit (41) along the surface of the sub-plate (43). A main plate (33) of the main heat exchange unit (31) is provided with a main-side engagement section (36) with which a sub-side engagement section (46) is engaged from a stacking direction of the main fins (32) of the main heat exchange unit (31), in a state in which the sub-heat exchange unit (41) is disposed adjacent to the main heat exchange unit (31).
