To provide an oscillation welded pallet in which occurrence of any defective welding or deviation is suppressed, the welding strength of outer peripheral wall halves with each other is high, and the appearance is good.

An outer peripheral wall half part 8 and a partition wall half part 9 for partitioning a part surrounded by the outer peripheral wall half part 8 are provided in a cylindrical girder half part 2. The thickness of the outer peripheral wall half part 8 is larger than that of the partition wall half part 9. Fore end parts of the outer peripheral wall half part 8 are integrated by the oscillation welding to form an outer peripheral wall 10 of a cylindrical girder part 6. Fore end parts of the partition wall half parts 9 in the direction across the oscillating direction of the oscillation welding are integrated by the oscillation welding except a part thereof, and a partition wall 11 for vertically partitioning the inside of the outer peripheral wall 10 is constituted by both partition wall half parts 9. A small space 12 is formed between the part not subjected to the oscillation welding of the fore end parts of the partition wall half parts 9.