A strap attaching section of a folding portable apparatus includes a recessed section arranged on a hinge section of a case configuring the portable apparatus, a strap holder stored in the recessed section, and a coupler for coupling the strap holder and the hinge section. The coupler includes a first pin hole which penetrates the strap holder, a second pin hole formed on the hinge section, a groove formed on an outer surface of the hinge section, and a pin. The groove is provided with a first region whereupon one end of the second pin hole opens, and a second region continued to the first region. A first portion of the pin extends through the first and second pin holes, and a second portion of the pin is arranged in the second region in the groove. A cover is removably attached to the case to cover the groove.