WIPER ARM

Provided is a wiper arm which fixes tubes easily while preventing the tubes from rotating in the circumferential direction. The wiper arm (11) includes an arm head, an arm shank (12) including a top wall (12c) connected to a pair of side walls (12a, 12b), tubes (20, 21) disposed inside the arm shank (12), and a bottom cover (14) jointed to the side walls (12a, 12b). The bottom cover (14) includes a body part (14a) in a plate shape and third wall parts (14cc). The tubes (20, 21) include first flat surfaces (20ba, 21ba) contacting the body part (14a), second flat surfaces (20ca, 21ca) contacting the third wall parts (14cc), and shank side surfaces (20ea, 21ea) connected to the first flat surfaces (20ba, 21ba) and the second flat surfaces (20ca, 21ca), and ejection holes (20a, 21a) are opened on the shank side surfaces (20ea, 21ea), respectively.