\input zb-basic \input zb-ioport \iteman{io-port 05130910} \itemau{Chang, K.S.; Cho, D.H.; Kim, B.S.; Song, T.S.; Yoo, I.} \itemti{A change of scale formula for Wiener integrals of unbounded functions over Wiener paths in abstract Wiener space.} \itemso{Wang, Yuefei (ed.) et al., Complex analysis and applications. Proceedings of the 13th international conference on finite or infinite dimensional complex analysis and applications, Shantou University, Shantou, China, August 8--12, 2005. Hackensack, NJ: World Scientific (ISBN 981-256-868-9/hbk). 22-43 (2006).} \itemab Summary: Let $C_0(\bbfB)$ denote the space of all abstract Wiener space-valued continuous functions on $[0,T]$ which vanish at 0. In this paper, we establish a change of scale formula for Wiener integrals of functions on $C_0(\bbfB)$ which need not be bounded or continuous. Using our formula, we obtain the above change of scale formulas for Wiener integrals of bounded or unbounded functions on classical and abstract Wiener spaces, as corollaries. \itemrv{~} \itemcc{} \itemut{analytic Feynman integral; change of scale formula; Fresnel class; generalized Fresnel class; Wiener paths in abstract Wiener space} \itemli{} \end