Microcontact printing (µCP) technique is a simple but a powerful method to fabricate patterned films. As a base material of µCP, polydimethylsiloxane (PDMS) stamp is often used. In general, it is difficult to prepare the films onto PDMS stamp because of the low wettability of the stamp. In order to control the wettability of stamp, the surface is treated with O2 plasma, vacuum ultraviolet light and so on. Such surface treatments lead good wettability for preparing the films on the stamp, but make it difficult to transfer the films on another substrate. Thus, one of the crucial issues of μCP is how to control the wettability of the stamp. In this study, we propose a novel μCP technique by PDMS modified with the spiropyran and demonstrate organic field-effect transistors (OFETs) with the poly(3,4-ethylenedioxythiophene):Poly-(styrenesulfonate) (PEDOT:PSS) S-D electrodes.