The objective is the provision of intrusion detection sensor panels, which when used to enclose a closed space as a closed space apparatus, protect against the unlawful intrusion into that closed space, as well as the removal or secretion of articles into that closed space. To achieve that objective, the present invention provides a closed space apparatus comprised of intrusion detection sensor panels that detect intrusions over their entire surface. The intrusion detection sensor panels are not merely ones which incorporate a plurality of wire or point sensors over their surface, but they are characterized by being panels in which the overall panel functions to detect intrusions across its entire surface without gaps or lapses. Specifically, these surface detection function panels can be structured so that the panel interior or the side facing the closed space has an embedded optical fiber or fine electric wire at a specific density, so that if a part of the panel is broken or there is an intrusion from the outside, the severance of the optical fiber or fine wire is detected, to thereby guard the closed space against unlawful intrusion.