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.