Hypopigmented mycosis fungoides is one of atypical, rare clinical variants of mycosis fungoides (MF) characterized by solely hypopigmented to achromic patches or more commonly in combination with studding erythematous papules or plaques. The epidemiologic features that characterize hypopigmented MF from classical MF comprise its high prevalence among younger patients such as childhood and adolescence, and high skin phototype (usually Fitzpatrick skin scale IV-V). In the respect of treatment, psoralen plus ultraviolet A (PUVA) got the majority of the child patients treatment in the previously reported literatures. And the reports on the narrowband ultraviolet B phototherapy have recently been come out as a successful treatment alternative for PUV A therapy. We herein would like to present a Korean child of hypopigmented mycosis fungoides successfully treated with 308nm excimer laser which has not been reported before.