An end member which is disposed in an end portion of a columnar rotating body, comprising: a shaft member; and a bearing member to which the shaft member is attached, wherein the shaft member includes a rotating shaft, a rotating force receiving portion which is provided on one end side of the rotating shaft, is engageable with a rotating force applying portion of an image forming apparatus main body, and receives a rotating force from a driving shaft in an engaged posture, a base end portion which is disposed on the other end side of the rotating shaft, and a rotating force transmission pin for transmitting the rotating force to a bearing member, wherein a hole through which the rotating force transmission pin passes is provided in the base end portion, and the shaft member is capable of swinging as the hole is greater with respect to the rotating force transmission pin, and wherein the bearing member includes a tubular body, a holding portion which is disposed on an inside of the tubular body, and is a recess portion that holds the rotating force transmission pin, characterized in that the bearing member includes a projection-like regulating member which extends in the circumferential direction for regulating attachment and detachment of the rotating force transmission pin by rotating the shaft member in a circumferential direction of the tubular body, and a groove which extends in a circumferential direction in order to allow the regulating member to retract. a shaft member; and a bearing member to which the shaft member is attached, wherein the shaft member includes a rotating shaft, a rotating force receiving portion which is provided on one end side of the rotating shaft, is engageable with a rotating force applying portion of an image forming apparatus main body, and receives a rotating force from a driving shaft in an engaged posture, a base end portion which is disposed on the other end side of the rotating shaft, and a rotating force transmission pin for transmitting the rotating force to a bearing member, a rotating shaft, a rotating force receiving portion which is provided on one end side of the rotating shaft, is engageable with a rotating force applying portion of an image forming apparatus main body, and receives a rotating force from a driving shaft in an engaged posture, a base end portion which is disposed on the other end side of the rotating shaft, and a rotating force transmission pin for transmitting the rotating force to a bearing member, wherein a hole through which the rotating force transmission pin passes is provided in the base end portion, and the shaft member is capable of swinging as the hole is greater with respect to the rotating force transmission pin, and wherein the bearing member includes a tubular body, a holding portion which is disposed on an inside of the tubular body, and is a recess portion that holds the rotating force transmission pin, a tubular body, a holding portion which is disposed on an inside of the tubular body, and is a recess portion that holds the rotating force transmission pin, characterized in that the bearing member includes a projection-like regulating member which extends in the circumferential direction for regulating attachment and detachment of the rotating force transmission pin by rotating the shaft member in a circumferential direction of the tubular body, and a groove which extends in a circumferential direction in order to allow the regulating member to retract. a projection-like regulating member which extends in the circumferential direction for regulating attachment and detachment of the rotating force transmission pin by rotating the shaft member in a circumferential direction of the tubular body, and a groove which extends in a circumferential direction in order to allow the regulating member to retract.