Bacterial shot hole disease caused by Xanthomonas arboricola pv. pruni(XAP) is a major plant disease in stone fruits as peach, plum, apricot, Japanese apricot and plumcot in South Korea. Aim of this study was tested cross pathogenicity of XAP in stone fruits. Bacterial isolates of XAP were obtained from diseased leaves of stone fruits. Cross pathogenicity of the isolates was studied by inoculating each isolate into three stone fruits as peach, apricot, plumcot. Three Inoculums were cultured 2 days on LB broth and adjusted to 1 × 10⁷ cell/mL. Each Inoculum was sprayed on healthy leaves of peach, apricotand plumcot. After being kept in 100% humidity for 24 hours, the inoculated plants were incubated at 25 degrees. The development of symptom as water socked was observed visually 2~3 days after inoculation(DAI). Three isolates were infected three different stone fruit leaves. These findings suggest that XAP was possible to cross infection and occurrence disease for stone fruits. This results will be helpful to know biological characteristics of XAP in stone fruits and set up management strategies.