Clutch friction plate and clutch device

A clutch friction plate comprising:

• multiple friction members having a substantially rectangular shape and arranged along a circumferential direction on a surface of a core bar formed in a flat-plate annular shape;
• and
• oil grooves each formed by a clearance between adjacent ones of the friction members,
• wherein each friction member includes
• an outer side facing an outer edge portion of the core bar and extending along the outer edge portion, and
• an inner side facing an inner edge portion of the core bar and extending parallel to the outer side along the inner edge portion,
• the outer side and the inner side are inclined with respect to a perpendicular line perpendicular to a line passing through a center of the each friction member and a center of the core bar,
• a width of each of the oil grooves on an outer peripheral side of the core bar is greater than a width of each of the oil grooves on an inner peripheral side of the core bar, each of the width of each of the oil grooves on the outer peripheral side and the width of each of the oil grooves on the inner peripheral side is shorter than a width of each of the friction members as a circumferential length,
• the outer side and the inner side are at equal to or greater than 7° and equal to or less than 30° with respect to the perpendicular line,
• the friction members are provided on front and back surfaces of the core bar, and
• the friction members provided on one of the front and back surfaces are inclined with respect to the perpendicular line in a rotational direction of the clutch friction plate and the friction members provided on another one of the front and back surfaces are inclined with respect to the perpendicular line in a direction opposite to the rotational direction of the clutch friction plate.