Abstract: A cassette loading device in a cassette tape recorder has a cassette housing adapted to accommodate a cassette extractably inserted thereinto and to move between a cassette extraction position and a cassette loading space. The cassette loading device comprises a cassette guiding member disposed to face the cassette loading space to guide the cassette into the cassette loading space. The cassette guiding member has inclined guide parts which function, in a case where the cassette loading operation is carried out with the cassette in a state wherein it is not completely accommodated within the cassette housing, to guide the rear part, as viewed in the insertion direction, of the cassette at an intermediate point in the entering movement of the cassette housing into the cassette loading space thereby to press the cassette fully and positively into the cassette housing.