This invention provides a wiper arm which can keep the wiper to work normally and will not give off harsh noise when the wiper is in an operation state. The wiper arm (1) is located at the end part of the shaft supporting arm head (11) on the drive shaft, which can support the retainer (12) in a pivoted manner when standing up and falling down at the position near the front end of the arm head (11), can also support a spring guiding part (7) in a pivoted manner at the front part of the arm head (11) , A strengthen part(9) is arranged at the base of the retainer (12) that is near the front ofthe spring guiding part (7) , A compressed helical spring(14) is spanned between the position close to the base of the spring guiding part (7) and the front end of the spring guiding part (7), A retaining bracket (15) for holding the compressed helical spring is arranged between the walls(91) of the strengthen part(9) and the compressed helical spring(14) .