The invention relates to a multilayer blow-molded container and a manufacture method thereof. The container is a multilayer blow-molded container having a structure that a polyglycolic acid layer is provided as a core layer, and thermoplastic polyester resin layers are arranged as inner and outer layers, wherein the melt viscosity x of a polyglycolic acid forming the polyglycolic acid layer is 300 to 900 Pa.s as measured at a temperature of 270 DEG C and a shear rate of 122 sec<-1>, the melt viscosity y of a thermoplastic polyester resin forming the thermoplastic polyester resin layers is 250 to 600 Pa.s as measured at a temperature of 290 DEG C and a shear rate of 122 sec<-1>, and a melt viscosity ratio x/y between both melt viscosities is 0.85 to 1.80.