Disclosed is a cleaning sheet including a main body which is intended to be placed on a bottom face of a cleaning head and attachment sheets which extend from the main body and are intended to be secured on a top face of the cleaning head. The main body has an attachment surface and a cleaning surface on opposite sides. The attachment surface is intended to face the bottom face of the cleaning head. The main body includes a substrate sheet and a stretchable support sheet disposed on a cleaning surface side of the substrate sheet to have projections extending beyond opposite side edges of the substrate sheet. Each attachment sheet is joined to a respective projection of the support sheet.