To provide cards excellent in biodegradability, provided with gate characteristics such as folding endurance needed in machine reading and rigidity and used for one-time usage such as prepaid cards and admission tickets, etc.

The biodegradable cards is formed of a biodegradable resin composition layer as a base material 2 comprising 100 pts.wt. of a resin blend consisting of (A) 85-5 wt.% polylactic acid-based resin, (B) 5-50 wt.% aliphatic polyester resin and (C) 10-45 wt.% polycaprolactone-based resin and (D) 5-300 pts.wt. of a filler and a magnetic recording layer 4 and/or a thermosensitive recording layer formed on the base material.