To provide a PET-made biaxially-stretched blow-molded bottle which is excellent in safety and manageability even in the case of a large container having a capacity of several liters by improving the inserting performance of a handle and achieving high strength by a fitting structure of a PET-made bottle body and the handle.

In the synthetic resin-made biaxially-stretched blow-molded bottle with the handle in which the handle 8 serves as an insert material, a lower region of the insert part of the handle 8 is positioned to be away compared with an upper region thereof from the stretching axis of a preform P to be biaxially-stretched blow-molded into the bottle body 1. As a result, the thickness of a handle attaching part 3 is increased, and the insert attaching strength of the handle 8 is increased by a widened part 6a of a vertical projecting part 6.