To provide an aquatic plant transplanter that can be easily held on a bottom floor of a water tank without scratching or floating, and that can be implanted in a delicate layout. An aquatic plant transplanter 1 comprising: a plate material 2 that holds aquatic plants 4 and is embedded in a bottom floor 6 of a water tank 5; and a projection 3 that protrudes upward from the plate material 2 and is clamped by tweezers 7. The plate material 2 has a hole through which the aquatic plants 4 are inserted and locked, and a notch communicating from the side surface to the hole, and the material of the plate material 2 and the protrusion 3 is a biodegradable plastic, and the biodegradable plastic is made of powder or It was set as the structure of the aquatic plant transplant tool in which granular fertilizer for aquatic plants was mixed. [Selection] Figure 5【課題】水槽底部の底床に、水草をキズ付けることなく、また浮かせることなく、容易に保持させることができ、さらに繊細なレイアウトでの植え込みも可能な、水草移植具を提供する。【解決手段】水草4を保持し、水槽5の底床6に埋設される板材2と、板材2から上方に突出しピンセット7で挟持される突起3と、からなる水草移植具1であって、板材2が、水草4を挿通、係止させる穴と、側面から穴まで連通する切れ込みを備え、また板材2及び突起3の素材が、生分解性プラスチックであり、生分解性プラスチックに、粉末又は粒状の水草用肥料が混在している水草移植具の構成とした。【選択図】図5