The present invention provides a wet-type multi-plate friction engaging apparatus comprising a clutch portion including internally toothed plates and a piston adapted to apply an urging force for engaging the internally toothed plates and wherein load acting portions acting on the clutch portion are arranged on both sides of the clutch portion, and a contact area of the load acting portion through which the load acting portion is contacted with the clutch portion is located in a predetermined range between about 20% of a radial width of a friction engaging portion from a central position of the friction engaging portion in an outer diameter direction and about 20% of the radial width of the friction engaging portion in an inner diameter direction, and a radial width of the contact area is smaller than about 10% of the radial width of the friction engaging portion.