1. A movement region prediction apparatus comprising: a mobile body detection device that detects a mobile body around a host vehicle; a prediction device that predicts a movement region of the detected mobile body after a prediction time, wherein the prediction device has a plurality of movement prediction models that have different prediction times for predicting the movement region of the mobile body, and performs prediction using the plurality of movement prediction models to predict the movement region of the mobile body; and a degree of normality acquisition device that acquires a degree of normality of a situation of movement of the detected mobile body, wherein the prediction device selects a movement prediction model from the plurality of movement prediction models based on the acquired degree of normality, and predicts the movement region of the mobile body using the selected movement prediction model, wherein, in the case where the movement prediction of the mobile body around the host vehicle that is normal in the situation of movement is performed, the prediction in conjunction with short prediction times are performed using movement prediction models prepared for a mobile body that is abnormal in the situation of movement, and the prediction in conjunction with long prediction times are performed using movement prediction models prepared for a mobile body that is normal in the situation of movement, and wherein the movement prediction model prepared for the mobile body that is normal in the situation of movement predicts a smaller range of existence in which the movable body is to exist after a predetermined time, as compared with the movement prediction model prepared for the mobile body that is abnormal in the situation of movement.