A multiway cock has a cock body, a cock member, and a cover. The cock body has a circular tube part that has a first portion and a second portion arranged parallel to each other along the axis of the circular tube part. A first port and a second port are formed in the outer periphery of the first portion, and a third port, a fourth port, a fifth port, and a sixth port are formed in the outer periphery of the second portion. The cock member has a barrel part in which a first flow passage and a second flow passage are formed, a lever installation part, and a lever. Opening or closing of the first to sixth ports formed in the first portion and the second portion can be selected by rotating the cock member.