Abstract: A colored resin composition for laser welding which comprises: (A) a polybutylene terephthalate based resin comprising polybutylene terephthalate or polybutylene terephthalate and a polybutylene terephthalate copolymer, (B) at least one kind of resin selected from polycarbonate resins, styrene based resins and polyethylene terephthalate resins, and (C) two or more kinds of organic pigments, wherein the resin (B) accounts for 1 to 50% by weight of the total amount of the polybutylene terephthalate based resin (A) and the resin (B), the pigment (C) is included in an amount of 0.02 to 0.5 parts by weight per 100 parts by weight of the total amount of the polybutylene terephthalate based resin (A) and the resin (B), laser beam transmittance in the near infrared radiation region of the wavelength of 800 nm to 1100 nm is 10% or greater when it is measured with a sample thickness of 3 mm, and L value which indicates the luminosity is less than 50.