Recording material feed cassette and recording apparatus

A recording material feed cassette comprising:

• a first cassette portion;
• a second cassette portion that is assembled with the first cassette portion so as to be capable of extending in an extension direction and retracting in a retraction direction relative to the first cassette portion and that, along with the first cassette portion, contains a recording material;
• and
• a locking mechanism that fixes the position of the second cassette portion relative to the first cassette portion,
• wherein the locking mechanism includes:
• a lock portion capable of moving in a first direction that is orthogonal to the extension direction and to the retraction direction so as to take on a locked position and an unlocked position;
• an operation portion that is provided in the second cassette portion and that is capable of moving in a second direction that follows the extension direction and the retraction direction;
• and
• a connection portion that connects the lock portion and the operation portion and that is capable of deforming as a result of the movement of the lock portion in the first direction.