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. <EOS>