A flush toilet includes a rear storage configured to store a control unit of a toilet main body. The rear storage includes a supporting wall configured to support the control unit so as to divide a storage region of the rear storage into upper and lower regions. In a rear supporting region of the rear storage, a first distance in a horizontal left-right direction from an outer joining portion to an inner joining portion in the supporting wall is shorter than a second distance in the horizontal left-right direction from an outer wall in the double wall of the skirt to an inner joining portion of the supporting wall. The second distance is set to a maximum width dimension in the left-right direction in an internal space of the double wall of the skirt.