The present invention provides a wet-type multi-plate clutch comprising an external toothed plate formed by sticking a friction material onto a core plate and an internal toothed plate formed by a friction material onto a core plate and designed so that torque is transmitted by engaging the external toothed plate with the internal toothed plate and wherein each of the external toothed plate and the internal toothed plate has one axial surface including a convex surface to which a friction material is stuck, and a friction surface from which a surface of the core plate is exposed and wherein the convex surface and the friction surface are opposed to each other.