A wet-type multiplate clutch has an outer circumferential drum section, an inner circumferential hub, a pressing member, and a clutch engagement unit composed of plural friction plates and separator plates alternately arranged between the drum section and the hub. One of mutually-contacting walls of the drum section and clutch engagement unit and one of mutually-contacting walls of the unit and pressing member are provided at their predetermined contact areas with inclinations such that, when the clutch is out of engagement, the mutually-contacting walls of the drum section and unit and the mutually-contacting walls of the unit and pressing member form wedge-shaped spaces between them, respectively, as viewed in a radially-extending, axial cross-section, said wedge-shaped spaces being gradually reduced in widths thereof toward an exterior in a radial direction and, when the clutch is in engagement, the mutually-contacting walls of the drum section and unit and the mutually-contacting walls of the unit and pressing member radially extend at right angles relative to a central axis of the wet-type multiplate clutch and are in close contact with each other, respectively.