The performance characteristics of organic photovoltaic cells using pentacene as a hole conducting material have been investigated. Pentacene has been extensively studied as a p-type semiconductor in organic field-effect transistors. In this study, pentacene was incorporated into PEDOT:PSS Film to improve mobility in the hole conducting layer. Organic photovoltaic cells have been fabricated with the structure of ITO/poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)(PEDOT:PSS)-pentacene/CuPc/CuPc:C-60/C-60/BCP(bathocuproine)/Al. The power conversion efficiency was strongly dependent on the doping amount of pentacene in the PEDOT:PSS-pentacene films. Fabrication parameters also affected on the performance of pentacene-based photovoltaic cells.