A seedling material of shellfish is obtained according to this invention, wherein the seedling material of shellfish includes a metal iron and a carbon material serving as a seedling part, and at least one part of the carbon material and the metal iron contact each other. In this way, the collecting efficiency is extremely high and stable, and an installation period of the seedling material is not influenced by a spawning period.根據本發明,可獲得一種貝類的著卵材,其構成為包含金屬鐵與成為著卵部的碳材,且使該碳材與該金屬鐵的至少一部分相接觸,藉此使採苗效率極高且穩定,且著卵材的設置時期亦不會被產卵時期左右。