A monitoring apparatus for a housing includes: an opening/closing section provided to the housing; a detection section provided to the housing, having a wireless IC chip in which alarm information is pre-stored, and an antenna driving the wireless IC chip with a driving electric power induced by receiving a predetermined radio wave and wirelessly transmitting the alarm information outputted from the wireless IC chip; a reader provided independently outside the housing, and outputting the predetermined radio wave and receiving the alarm information transmitted from the detection section; and a restriction section restricting a transmission of the alarm information when the opening/closing section is in a closed state.