PROBLEM TO BE SOLVED: To provide a device for automatically packing seedling-raising chaff mats, which can surely grip the soft and brittle seedling-raising chaff mats and can automatically and efficiently pack the mats in seedling-raising boxes. SOLUTION: This device for automatically packing the seedling-raising chaff mats comprises a mat-setting portion 2 disposed at the end of a mat-transporting device for transporting the seedling-raising chaff mats, a packing portion 3 to which an empty seedling-raising box B is set, a moving frame 8 which reciprocates between a place above the mat-setting portion 2 and a place above the packing portion 3 and is upward or downward moved above the mat-setting portion 2 and above the packing portion 3, pairs of holding needles 9 downward projected from the moving frame 8, and a mat-holding frame which is upward or downward moved with respect to the moving frame 8. The lower portions of each pair of the holding needles 9 are closed, when the moving frame 8 is downward moved above the mat-setting portion 2, and are also opened, when the moving frame 8 is downward moved above the packing portion 3. The mat-holding frame is usually interlocked with the moving frame 8, and when the moving frame 8 is upward moved in the packing portion 3, the mat-holding frame is upward moved, after the moving frame 8 is upward moved.
