A method for manufacturing a vehicle spring provided with a bar member including a bar body formed of a steel material and a coating film covering the bar body, and a rubber member provided on an attachment part at a part of the bar member in a longitudinal direction, the vehicle spring comprising: a rough surface formed on a surface of the bar body composed of shot peening indentations and covered with the coating film, a first portion (θ1) where a contact angle with water exceeding 65° in a region excluding the attachment part of a surface of the coating film; a second portion (θ2) present on an adhesive surface of the attachment part on a part of the surface of the coating film and including minute uneven portions where a maximum height of a surface roughness curve and a wavelength are small as compared with uneven portions of the first portion (θ1), and an adhesive provided between the adhesive surface and a bonded surface of the rubber member, wherein the maximum height of the surface roughness curve of the second portion (θ2) is smaller than the thickness of the coating film; wherein the method further comprises: forming the rough surface composed of shot peening indentations on a surface of the bar body by hitting a large number of shot particles on the surface of the bar body by a shot peening machine, forming the coating film of a resin in which a contact angle with water exceeds 65°, on a surface of the bar body, thereby covering the rough surface with the coating film; changing the contact angle of a bonding surface of the attachment part to 65° or less by plasma processing for making the contact angle of the coating film small; applying an uncured liquid adhesive to the bonded surface of the rubber member; heating a region including the attachment part of the bar member, after heating the region including the attachment part, making a bonded surface of the rubber member overlap the attachment part of the bar member; and curing the adhesive, with heat of the bar member, in a state where the rubber member is pressed to the attachment part. a rough surface formed on a surface of the bar body composed of shot peening indentations and covered with the coating film, a first portion (θ1) where a contact angle with water exceeding 65° in a region excluding the attachment part of a surface of the coating film; a second portion (θ2) present on an adhesive surface of the attachment part on a part of the surface of the coating film and including minute uneven portions where a maximum height of a surface roughness curve and a wavelength are small as compared with uneven portions of the first portion (θ1), and an adhesive provided between the adhesive surface and a bonded surface of the rubber member, wherein the maximum height of the surface roughness curve of the second portion (θ2) is smaller than the thickness of the coating film; wherein the method further comprises: forming the rough surface composed of shot peening indentations on a surface of the bar body by hitting a large number of shot particles on the surface of the bar body by a shot peening machine, forming the coating film of a resin in which a contact angle with water exceeds 65°, on a surface of the bar body, thereby covering the rough surface with the coating film; changing the contact angle of a bonding surface of the attachment part to 65° or less by plasma processing for making the contact angle of the coating film small; applying an uncured liquid adhesive to the bonded surface of the rubber member; heating a region including the attachment part of the bar member, after heating the region including the attachment part, making a bonded surface of the rubber member overlap the attachment part of the bar member; and curing the adhesive, with heat of the bar member, in a state where the rubber member is pressed to the attachment part.