PROBLEM TO BE SOLVED: To provide a technique capable of stabilizing a position when raising a seedling and preventing roots from growing spirally in a body.SOLUTION: A cultivation container 1 for raising seedling which cultivates a tree seedling comprises a body 10, and raises a seedling in the state where a seed is sown or a seedling is planted into soil poured in the body 10. The body 10 has an opening 11 at an upper part, is constituted by connecting edge parts of a two-folded sheet member 12 or edge parts of two sheet members 12, and has two cut-out parts 13 constituted so as to cut out boundary portions between the side edge parts and a bottom edge part of the sheet member 12.