While the term "To no chujo" refers to a person who concurrently assumed the positions of Kurodo no to and Konoe no chujo (Middle Captain of the Inner Palace Guards), To no ben is normally understood as a person who concurrently assumed the positions of Kurodo no to and Chuben (Middle Controller) (of the Left and Right).
頭中将が近衛中将の兼帯であったのに対して、頭弁は（左右）中弁の兼帯であったと解されることが多い。