Image reading device and image forming apparatus

An image reading device includes a housing including a support that supports a document, an opening and closing (O/C) member supported to rotate around a rotary shaft between an open position at which a top surface of the support is exposed and a closed position at which the top surface is covered by the O/C member, a reading member included in the O/C member to read the document, a processing unit included in the housing to process information read by the reading member, a connecting member electrically connecting the reading member and the processing unit, and a protective member whose first end is rotatably supported by the O/C member and that accommodates the connecting member in its internal space while being supported in a state of hanging from the O/C member and in a state where its second end is supported while not being constrained with respect to the housing.