PURPOSE: To provide an electric ball valve saving trouble and space in piping by devising the construction of a valve body.

CONSTITUTION: The intersection of a T-shaped passage 3 forming three ports P1, P2 and P3 at an end section in a housing 2, is provided with a spherical valve body 4 being rotatable and having such a T-shaped passage 5 as connects at least two of the ports P1, P2, P3. In addition, a drive shaft is laid along the center axis of the valve body 4 orthogonal with plane including the T-shaped passage 3, and one end of the shaft is fixed to the valve body 4. Also, a motor output shaft is connected to the other end of the drive shaft projected from a housing 2.