A bearing with a wireless sensor, the bearing comprising: a bearing body; a detection sensor that is provided in the bearing body and configured to detect a physical quantity regarding the bearing body; a transmission processing unit that is provided in the bearing body and configured to transmit detection information by the detection sensor via wireless communication; a signal processing unit that is provided in the bearing body and configured to control a transmission interval of the detection information by the transmission processing unit, characterized in that the signal processing unit is configured to make the transmission interval shorter in a plurality of stages by comparing the detection information with a plurality of threshold values sequentially or continuously in accordance with a transmission interval function as the detection information has a larger value in an abnormal value direction, the abnormal value direction being a direction of the detection information from a normal value side toward an abnormal value side; in that it comprises a power generation unit that is provided in the bearing body and configured to provide electric power to the detection sensor, the transmission processing unit, and the signal processing unit, and in that the signal processing unit comprises transmission intervals associated with each region between at least two thresholds or the transmission interval function such that an amount of change of the transmission interval with respect to an amount of change of the detection information is larger as the detection information is larger in the abnormal value direction. a bearing body; a detection sensor that is provided in the bearing body and configured to detect a physical quantity regarding the bearing body; a transmission processing unit that is provided in the bearing body and configured to transmit detection information by the detection sensor via wireless communication; a signal processing unit that is provided in the bearing body and configured to control a transmission interval of the detection information by the transmission processing unit, characterized in that the signal processing unit is configured to make the transmission interval shorter in a plurality of stages by comparing the detection information with a plurality of threshold values sequentially or continuously in accordance with a transmission interval function as the detection information has a larger value in an abnormal value direction, the abnormal value direction being a direction of the detection information from a normal value side toward an abnormal value side; in that it comprises a power generation unit that is provided in the bearing body and configured to provide electric power to the detection sensor, the transmission processing unit, and the signal processing unit, and in that the signal processing unit comprises transmission intervals associated with each region between at least two thresholds or the transmission interval function such that an amount of change of the transmission interval with respect to an amount of change of the detection information is larger as the detection information is larger in the abnormal value direction.