A label for in-mold forming is provided which is excellent in strength, water resistance, and adhesion strength, is usable in both indoor and outdoor applications and even in water, and can be used for containers for frozen foods, industrial products, various containers for chemicals, manufacturing process control applications, physical distribution management applications, tote boxes, etc. Also provided is a thermoplastic resin container bearing the label. This label for in-mold forming has the function of an IC label and has a surface which can be printed. It is free from the fear about security that the IC chip or antenna disposed therein may be seen through. When the label is bonded to a thermoplastic resin container, the IC chip and antenna disposed therein are not damaged in the process. The label for in-mold forming, which is for use in in-mold forming, comprises: a thermoplastic resin film (1) having a heat-sealable layer (1a); a thermoplastic resin film (2) which is printable; and an antenna and an IC chip for non-contact data sending/receiving, the antenna and the IC chip being interposed between the thermoplastic resin film (1) and the thermoplastic resin film (2).