To provide a cover member effectively covering the end part of an upper wall portion of a channel of a squeegee, and stably mounted to the channel.

A cross-section orthogonal to the axis of this cover member 44 is integrally formed with: a first engagement portion 46 positioned on the base end side; a second engagement portion 50 positioned on the front end side; and a connection portion 48 connecting the first engagement portion 46 and the second engagement portion 50 to each other between the first engagement portion and the second engagement portion. The first engagement portion 46 has a first recessed portion 46a covered on a bulging portion 10a of the channel 10 to engage with the bulging portion. The second engagement portion 50 has a second recessed portion 50b covered on the front end part 10d of the upper wall portion 10b of the channel 10 to engage with the front end part. The channel 10 is fitted into an internal space 52 surrounded by the first engagement portion 46, the connection portion 48, and the second engagement portion 50, and the cover member is mounted.