The bone junction plate which consists of the thermoplasticity polymer the formation aspect of three dimensional curved surface form (8b and 10b) the male die which it has (8) with the mold (10) with, (P) while it puts it heats, softens above softening temperature, the bone junction plate which it softens (P) while it put from softening temperature cooling in low temperature, it solidifies, bone junction plate formation tool.三次元的曲面形状の成形面(8b、10b)を備えた雄型(8)と雌型(10)により、熱可塑性ポリマーからなる骨接合プレート(P)を挟んだまま軟化温度以上に加熱、軟化させ、軟化させた骨接合プレート(P)を挟んだまま軟化温度より低温に冷却して固化させる、骨接合プレート成形具。