An occupational therapy support device according to the present disclosure includes an input data reception unit, an estimation unit, and an estimated data output unit. The input data reception unit receives the input of input data including sleep data of the subject of occupational therapy evaluation and the basic data of the subject. The estimation unit inputs the received input data to a trained artificial intelligence to cause the artificial intelligence to estimate the activity of daily living data of the subject and the physical function data of the subject. The estimated data output unit outputs the data estimated by the artificial intelligence. The sleep data includes the number of turns, the number of body movements, the number of times of going to the bathroom, and the time in the bathroom. The basic data includes the age, height, weight, and medical history. The activity of daily living data includes eating, going to the bathroom, defecation, transfer to the bathroom, locomotion/walk, comprehension, problem solving, and memory. The physical function data includes the grip strength. This configuration enables a user to obtain objective data that does not depend on the evaluator and is useful for performing occupational therapy.