A sheet supporting apparatus includes a body, a supporting portion configured to be held in an elevating manner by the body and to support a sheet, a sheet regulation portion regulating a position of the sheet supported on the supporting portion, a movement portion capable of moving between a first position where the sheet regulation portion regulates the position of the sheet supported on the supporting portion, and a second position where the supporting portion is regulated from elevating with respect to the body, and a movement regulation unit regulating the movement portion from moving to the second position.

A sheet supporting apparatus includes a cassette body supporting a sheet, a regulation device disposed on the cassette body in a moving direction and regulating a position of an edge of the sheet, and a plurality of engaged portions disposed on the cassette body. The regulation device includes a body portion, an engaging portion moving between an engagement position at which the engaging portion engages with one of the engaged portions and a separation position at which the engaging portion is separated from the engaged portions, an operation member pivotably supported on the body portion and operated between a first posture at which the operation member positions the engaging portion at the engagement position and a second posture at which the operation member positions the engaging portion at the separation position, and a retention portion retaining the operation member at the first posture.

A sheet supporting apparatus includes a cassette body supporting a sheet, a regulation device disposed on the cassette body in a moving direction and regulating a position of an edge of the sheet, and a plurality of engaged portions disposed on the cassette body. The regulation device includes a body portion, an engaging portion moving between an engagement position at which the engaging portion engages with one of the engaged portions and a separation position at which the engaging portion is separated from the engaged portions, an operation member pivotably supported on the body portion and operated between a first posture at which the operation member positions the engaging portion at the engagement position and a second posture at which the operation member positions the engaging portion at the separation position, and a retention portion retaining the operation member at the first posture.

A sheet supporting apparatus includes a body, a supporting portion configured to be held in an elevating manner by the body and to support a sheet, a sheet regulation portion regulating a position of the sheet supported on the supporting portion, a movement portion capable of moving between a first position where the sheet regulation portion regulates the position of the sheet supported on the supporting portion, and a second position where the supporting portion is regulated from elevating with respect to the body, and a movement regulation unit regulating the movement portion from moving to the second position.

A sheet supporting apparatus includes a supporting portion to support a sheet, and a regulation unit to regulate a position of an edge of the supported sheet. The regulation unit includes a body portion, an engagement portion to move between an engagement position at which the engagement portion engages with the supporting portion and a separation position at which the engagement portion is separated away from the supporting portion, and an operation portion to move the engagement portion between the engagement position and the separation position. The operation portion is pivotably supported by the body portion and includes a pressing portion to press the engagement portion from the engagement position to the separation position by the operation portion being pivoted. In addition, a fixing component fixes the operation portion to be immovable with respect to the body portion so as to retain the engagement portion at the engagement position.

A sheet supporting apparatus includes a body, a supporting portion configured to be held in an elevating manner by the body and to support a sheet, a sheet regulation portion regulating a position of the sheet supported on the supporting portion, a movement portion capable of moving between a first position where the sheet regulation portion regulates the position of the sheet supported on the supporting portion, and a second position where the supporting portion is regulated from elevating with respect to the body, and a movement regulation unit regulating the movement portion from moving to the second position.

A sheet supporting apparatus includes a supporting portion configured to support a sheet, and a regulation unit configured to regulate a position of edge of the sheet supported by the supporting portion, the regulation unit configured to be moved and positioned with respect to the supporting portion. The regulation unit includes a body portion, an engagement portion supported by the body portion, and configured to move between an engagement position at which the engagement portion engages with the supporting portion and a separation position at which the engagement portion is separated away from the supporting portion, and a regulation portion configured to position the engagement portion with respect to the body portion such that the engagement portion is retained at the engagement position.