Abstract: A frame for a seat or chair for use in vehicles for public transportation includes a back of the chair and a base zone. The frame includes a non-skid designed zone, a perforation in the base of the frame, and a rabbet that runs along the back of an upper portion of the frame. The upper portion forms a part of a principal handle, and two longitudinal rabbets are vertically displaced in the lateral parts of the flanks of the frame, which form part of laterally fastened handles. Two embedded joining supports are inside the frame.