Sander

A sander, comprising:

• a sanding part having a planar sheet placement surface on which a sanding sheet can be set;
• and
• at least one clamping mechanism configured to hold the sanding sheet on the sanding part, wherein:
• the at least one clamping mechanism includes:
• a clamping part that is configured to hold the sanding sheet and to be slid in a direction parallel to the sheet placement surface between a closed position to hold the sanding sheet on a side surface of the sanding part and an open position to allow removal of the sanding sheet;
• at least one elastic element that applies a biasing force of biasing the clamping part toward the closed position, in a direction parallel to the sheet placement surface;
• and
• a holding mechanism that is configured to hold the clamping part in the open position against the biasing force, and
• the clamping part is allowed to hold the sanding sheet when the holding mechanism is released from holding the clamping part in the open position.