A sample storage tube for storing a sample including a lid and a tube body which is configured to be closed by the lid, wherein the tube body has two portions which are: a first molded portion being a continuous cylinder having an open end, a sidewall and a closed end, and a second molded portion , the first molded portion and the second molded portion being integrally molded by injection molding means, wherein the sidewall of the first molded portion has a dent portion spanning a circular-arc portion but not the entire circumference of the cylinder, the first molded portion being made of a first material, which is a plastic resin being translucent; the second molded portion is made of a second material, the second material being a plastic resin and having an information writable ability, the second molded portion being black and being able to be turned white by laser marking, the second molded portion comprising: an opening edge portion integrally formed onto the open end of the first molded portion and configured to contact an inner surface of the lid , wherein the second material has a suitable elasticity for securing airtightness between the tube body and the lid ; a bottom portion integrally formed on an outer surface of the closed end of the first molded portion , and a side surface portion integrally formed in the circular-arc portion of the sidewall of the first molded portion , the side surface portion connecting the opening portion and the bottom portion . a first molded portion being a continuous cylinder having an open end, a sidewall and a closed end, and a second molded portion , the first molded portion and the second molded portion being integrally molded by injection molding means, wherein the sidewall of the first molded portion has a dent portion spanning a circular-arc portion but not the entire circumference of the cylinder, the first molded portion being made of a first material, which is a plastic resin being translucent; the second molded portion is made of a second material, the second material being a plastic resin and having an information writable ability, the second molded portion being black and being able to be turned white by laser marking, the second molded portion comprising: an opening edge portion integrally formed onto the open end of the first molded portion and configured to contact an inner surface of the lid , wherein the second material has a suitable elasticity for securing airtightness between the tube body and the lid ; a bottom portion integrally formed on an outer surface of the closed end of the first molded portion , and a side surface portion integrally formed in the circular-arc portion of the sidewall of the first molded portion , the side surface portion connecting the opening portion and the bottom portion . an opening edge portion integrally formed onto the open end of the first molded portion and configured to contact an inner surface of the lid , wherein the second material has a suitable elasticity for securing airtightness between the tube body and the lid ; a bottom portion integrally formed on an outer surface of the closed end of the first molded portion , and a side surface portion integrally formed in the circular-arc portion of the sidewall of the first molded portion , the side surface portion connecting the opening portion and the bottom portion . <EOS>