Abstract: Disclosed is a method for producing Phalaenopsis orchid clone plants, which comprises cutting the tip of a growing root of a Phalaenopsis orchid that has been prepared under sterile conditions at a length of from 1 to 5 mm to prepare a root tip for culture having said predetermined length, cultivating said root tip in a PLB-inducing medium under sterile conditions to thereby induce PLB therein, further cultivating said PLB in a propagating medium, and then re-differentiating said PLB in a re-differentiation medium. The method is practicable and stably given PLB of Phalaenopsis orchids.