A friction Plate (10, 10a, 10b) in which a plurality of friction material segments (22, 24, 32, 34) are attached to a surface of an annular core plate in a circumferential direction, and oil grooves (40, 42, 44, 46, 48) are formed between adjacent friction material segments, characterized in that the friction plate (10, 10a, 10b) comprises: a first friction material set and a second friction material set which are alternately attached to the surface of the annular core plate in the circumferential direction; and an oil groove which is communicating an inner circumferential side with an outer circumferential side of the core plate and is formed between the first friction material set and the second friction material set, wherein the oil groove is configured so that an outer circumferential oil groove extending from nearly the center between an inner circumferential edge and an outer circumferential edge of the surface of the annular core plate toward the outer circumferential side and an inner circumferential oil groove extending from nearly the center toward the inner circumferential side intersect with each other with an angle; the first friction material set consists of a first segment and a second segment, and an outer circumferential communicating oil groove is formed between the first segment and the second segment, extending from nearly the center toward the outer circumferential side and communicates with the inner circumferential oil groove; and the second friction material set consists of a third segment and a fourth segment, and an inner circumferential communicating oil groove is formed between the third segment and the fourth segment, extending from nearly the center toward the inner circumferential side and communicates with the inner circumferential oil groove. a first friction material set and a second friction material set which are alternately attached to the surface of the annular core plate in the circumferential direction; and an oil groove which is communicating an inner circumferential side with an outer circumferential side of the core plate and is formed between the first friction material set and the second friction material set, wherein the oil groove is configured so that an outer circumferential oil groove extending from nearly the center between an inner circumferential edge and an outer circumferential edge of the surface of the annular core plate toward the outer circumferential side and an inner circumferential oil groove extending from nearly the center toward the inner circumferential side intersect with each other with an angle; the first friction material set consists of a first segment and a second segment, and an outer circumferential communicating oil groove is formed between the first segment and the second segment, extending from nearly the center toward the outer circumferential side and communicates with the inner circumferential oil groove; and the second friction material set consists of a third segment and a fourth segment, and an inner circumferential communicating oil groove is formed between the third segment and the fourth segment, extending from nearly the center toward the inner circumferential side and communicates with the inner circumferential oil groove.