A cloth assembly for making a protective pad for sports includes a plurality of supporting fibers extending between and supporting first and second knitted cloths, providing an elastic air-permeable cloth. A knitted cloth includes a first side having a plurality of loops and a second side bonded to an outer face of the first knitted cloth. A hook tape includes a plurality of hooks on a face thereof. The hook tape is fixed to the first side of the knitted cloth or an outer surface of the second knitted cloth according to the type of the protective pad to be made. When the hook tape is fixed to the knitted cloth, the face of the hook tape having the hooks faces the first side of the knitted cloth having loops. Only a portion of the hook tape overlaps and is fixed to an end of the knitted cloth.