Cleaning sheet and cleaning instrument

A cleaning tool, comprising:

• a holder;
• and
• a cleaning sheet configured to be attached to the holder, wherein:
• the holder has a grip part configured to be held by a user, and an elongated part,
• the cleaning sheet has
• sheet members,
• a receiving part at which the sheet members are superposed on each other and which is configured to receive the elongated part, and
• a bonded part at which the sheet members are bonded to each other and which defines an outer edge of the receiving part,
• an insertion direction of the elongated part in the receiving part defines a first axis of the cleaning sheet, a direction opposite to the insertion direction in a direction of the first axis defines a removal direction, and a direction crossing the first axis defines a second axis of the cleaning sheet,
• the receiving part has
• an opening, and
• a receiving space formed contiguously to the opening and extending in the direction of the first axis,
• the receiving space has a first space region having a prescribed width and a second space region having a smaller width than the first space region, in the direction of the second axis,
• the first space region is disposed closer to the opening than the second space region in the direction of the first axis,
• the bonded part includes a first pair of bonded parts and a second pair of bonded parts,
• the first space region is disposed between the first pair of bonded parts in the direction of the second axis,
• the second space region is disposed between the second pair of bonded parts in the direction of the second axis, and
• the receiving space has two pairs of the first space region and the second space region, wherein
• one pair of the first space region and the second space region and another pair of the first space region and the second space region are configured to have line symmetry in the first axis.