Abstract: Crown galls were induced by direct infection of sterilized seedlings of Trichosanthes kirilowii Maxim. with Agrobacterium tumefaciens C58. Transformation of Ti in C58 was inspected by high_pressure_paper electrophoresis; the detection of nopaline in the crown galls showed that T_DNA of Ti plasmid had been transformed successfully. The crown tissues produced plantlets on MS medium and the plantlets were successfully transplanted and grew well.