when the polyester resin comprises ethylene terephthalate as the main repeating unit the polyester resin preferably contain other repeating ester unit s comprising a dicarboxylic acid component selected from the group consisting of isophthalic acid 1 5 1 6 1 7 2 6 and 2 7 naphthalenedicarboxylic acids phthalic acid cyclo hexanedicarboxylic acid dibromoisophthalic acid diphenyldicarboxylic acid diphenyl ether dicarboxylic acid diphenyl sulfone dicarboxylic acid diphenyl ketone dicarboxylic acid diphenoxyethanedicarboxylic acid phenylenedioxy diacetic acid adipic acid sebacic acid succinic acid glutaric acid piperic acid suberic acid azelaic acid undecanedioic acid dodecanedioic acid glycolic acid hydroxybenzoic acid and hydroxy naphthoic acid and or a diol component selected from the group consisting of trimethylene glycol tetramethylene glycol pentamethylene glycol hexamethylene glycol octamethylene glycol decamethylene glycol propylene glycol neopentyl glycol diethylene glycol cyclohexanedimethanol o m and p xylene glycols hydroquinone resorcinol dihydroxydiphenyl and dihydroxy diphenyl ether the molecular weight of the polyester resin is preferably 0 6 or more in terms of intrinsic viscosity measured at 25 u00b0 c in phenol tetrachloroethane weight ratio 60 40 when the intrinsic viscosity is less than 0 6 the strength of the container sometimes becomes unsatisfactory the resin composition as the raw material of the container according to the present invention comprises the polyester resin described above and 0 1 to 10 parts by weight based on.