The invention relates to an artificial seed formed of a seamless soft capsule having a structure of three or more layers comprising an innermost layer, an inner layer covering the innermost layer and an outermost layer covering the inner layer; wherein the innermost layer includes a redifferentiable plant cell tissue suspended in an aqueous liquid; the inner layer is constituted by an inner layer comprising a hardened oil that is solid at room temperature as the main component; and the outermost layer is a membrane having biodegradability.