According to an embodiment, a manifold includes a plurality of units disposed in a liquid flow channel including a hose. The unit includes a hollow tube body, three or more tube stubs communicating the inside of the tube body, and a connection fitting provided with each of the tube stubs and detachably connected to a connection target of same shape. The manifold forms a flow path communicating the tube stubs of the units while the units are detachably connected together with the connection fittings.