Five to thirty percent of persimmon peels were added to mushroom medium to investigate mycelial growth. Mycelialgrowth on the medium with persimmon peels was 82~96 mm (28 days) and was slower than that of the control withoutpersimmon peels as, 100 mm (28 days). Mycelial growth time on medium with 5 to 10% persimmon peels was similar to thecontrol without persimmon peels as 28 days but that on medium with 30% persimmon peels was delayed for 4 days. The time ofpinhead formations in medium with 10 to 20% persimmon peels was 8 days, the growth time to harvest was 10 days. Theseresults were similar to those of the control without persimmon peels. The sizes of pileus of treatments with 10 to 30% persimmonpeels were tend to be smaller compared with the control. The length of stipe of 10% persimmon peels treatment was 89 mmwhich was shorter than that of the control with 90 mm. The thickness of stipes of 10 to 20% persimmon peels treatments were36 to 42 mm which were tend to be thicker than that of the control with 42 mm.