To provide a seedling raising mat which has no positional deviation between a planting claw and seedling even when the mat is mounted on a seedling mount table of a rice transplanter and which can surely perform transplant work.SOLUTION: A seedling raising mat 1 comprises a lower part layer 2, an intermediate layer 3, and an upper part layer 4, the intermediate layer 3 comprises a fiber member on which, a biodegradable fiber on which seeds are mounted, is molded in a plate-state, the upper part layer 4 and the lower part layer 2 have rigidity higher than that in the intermediate layer 3, the upper part layer 4 has a plurality of inoculation holes 41 arranged at a prescribed interval.SELECTED DRAWING: Figure 1【課題】田植機の苗載台に載せた場合でも植付爪と苗の位置ずれがなく、移植作業を確実に行うことができる育苗マットを提供する。【解決手段】育苗マット１は、下部層２と中間層３と上部層４とを備え、中間層３は、種子が載置される、生分解性の繊維が板状に成型された繊維部材を含み、下部層２と上部層４は、中間層３よりも剛性が高く、上部層４は、所定間隔で設けられた複数の播種孔４１を有する。【選択図】図１
