Medium storage box and medium processing device

A medium processing device, comprising:

• a main body;
• and
• a medium storage box that is attachable to and detachable from the main body;
• wherein
• the medium storage box includes:
• a storage unit that stores a medium;
• a handle configured to rotate in opposite first and second rotational directions, with respect to the storage unit around a rotational axis between a first state standing with respect to the storage unit and a second state lying with respect to the storage unit;
• and
• a rotation restricting portion that, when the handle is in the first state, restricts rotation of the handle to only the first rotational direction;
• and
• the handle includes:
• a grip portion that extends in a direction parallel to the rotational axis;
• and
• an arm that extends in an extending direction to connect the grip portion to the storage unit, the arm being connected to the grip portion at an end thereof, the end of the arm having an arm upper surface portion that is of a flat surface or arm top portion that is of a non-flat surface;
• and
• the end of the arm is so formed that the entire arm upper surface portion, or a topmost portion of the arm top portion, is transversely spaced from and forward of a virtual line that extends in the extending direction from the rotational axis, with respect to the first rotational direction.