In a camera 12, a sound input unit inputs a monitoring sound obtained from a monitoring place, and an image generation unit generates a monitoring image obtained from the monitoring place. A sound anomaly detection unit then detects a sound anomaly in the monitoring place based on the monitoring sound, and an image anomaly detection unit detects an image anomaly in the monitoring place based on the monitoring image. A comprehensive anomaly judgment unit comprehensively judges whether or not there is an anomaly based on detection results of the sound anomaly detection unit and the image anomaly detection unit. When the comprehensive anomaly judgment unit judges that there is an anomaly, an anomaly notification unit notifies a controller 14 of the anomaly. An anomaly can be reliably detected by the comprehensive anomaly judgment.