A cleaning tool which is capable of exhibiting an adequate cleaning ability up to the back of a narrow gap when used to clean the narrow gap is provided. The cleaning tool is comprised of a cleaning sheet and a holding member 1. The holding member 1 comprises a leg member 2 for holding the cleaning sheet, an elongated support arm 3, and a handle member 4. The leg member 2 has a holding portion to which the cleaning sheet is attached, and is attached to the front end of the support arm 3. The handle member 4 has a sheath portion formed with a hollow interior to enable to accommodate the support arm 3 and to slide it therein, and a grip portion 42 provided so as to project upward from the sheath portion 41. The support arm 3 is provided at a position which does not project upward from the leg member 2.