To provide a washer tank having improved harmony and appearance in an engine room as well as from the outside of a vehicle and facilitating visual check of a remaining amount of liquid residing in the tank without requiring special means separately.

The washer tank 34 comprises an upper tank portion 34A and a lower tank portion 34B formed in container shape with respective opening portions 320, joined to each other at the end faces of the opening portions 320A, 320B. The upper tank portion 34A has a water injection port 66 in position, through which a washing liquid is injected, and is molded of a colored and non-transparent resin material. The lower tank portion 34B is molded of a transparent or semi-transparent resin material.