An anomaly determination apparatus, an anomaly determination method, and a program, capable of easily determining whether or not an anomaly has occurred are provided. An anomaly determination apparatus (1) includes a transformation unit (2) and an anomaly determination unit (3). The transformation unit (2) performs a transformation process using a transform function for transforming an anomaly level of a signal into a probability variable value, the probability variable value being a variable value in accordance with a predetermined probability distribution. Note that the transform function is a monotone function. The anomaly determination unit (3) determines presence/absence of an anomaly of a sample of the anomaly level by using a result of the transformation by the transformation unit (2).