A lamp iens for vehicles adapted to transmit light that is emitted from a lighting member, said lamp lens including: a light input surface adapted to face the lighting member, and having a surrounding surface portion that surrounds an optical axis extending in a front-rear direction, and an end surface portion that is connected to a front end of said surrounding surface portion, and that is disposed on the optical axis; a light output surface spaced apart from said light input surface along the optical axis; and a reflecting surface extending from said light input surface to said light output surface, surrounding the optical axis; characterized in that, said reflecting surface further having: two first reflecting portions spaced apart from each other in a left-right direction that is perpendicular to the front-rear direction when the lamp lens is mounted in a vehicle, each of said first reflecting portions having a plurality of reflecting segments, the plurality of reflecting segments being adapted for total reflection of a portion of the light which enters said lamp lens through said light input surface, wherein each adjacent two of said reflecting segments forming a stepped surface structure; and a second reflecting portion connected between bottom edges of said first reflecting portions and being formed with a plurality of optical structures, the plurality of optical structures being adapted to prevent total reflection of a portion of the light. a light input surface adapted to face the lighting member, and having a surrounding surface portion that surrounds an optical axis extending in a front-rear direction, and an end surface portion that is connected to a front end of said surrounding surface portion, and that is disposed on the optical axis; a surrounding surface portion that surrounds an optical axis extending in a front-rear direction, and an end surface portion that is connected to a front end of said surrounding surface portion, and that is disposed on the optical axis; a light output surface spaced apart from said light input surface along the optical axis; and a reflecting surface extending from said light input surface to said light output surface, surrounding the optical axis; characterized in that, said reflecting surface further having: two first reflecting portions spaced apart from each other in a left-right direction that is perpendicular to the front-rear direction when the lamp lens is mounted in a vehicle, each of said first reflecting portions having a plurality of reflecting segments, the plurality of reflecting segments being adapted for total reflection of a portion of the light which enters said lamp lens through said light input surface, wherein each adjacent two of said reflecting segments forming a stepped surface structure; and a second reflecting portion connected between bottom edges of said first reflecting portions and being formed with a plurality of optical structures, the plurality of optical structures being adapted to prevent total reflection of a portion of the light. two first reflecting portions spaced apart from each other in a left-right direction that is perpendicular to the front-rear direction when the lamp lens is mounted in a vehicle, each of said first reflecting portions having a plurality of reflecting segments, the plurality of reflecting segments being adapted for total reflection of a portion of the light which enters said lamp lens through said light input surface, wherein each adjacent two of said reflecting segments forming a stepped surface structure; and a second reflecting portion connected between bottom edges of said first reflecting portions and being formed with a plurality of optical structures, the plurality of optical structures being adapted to prevent total reflection of a portion of the light.