Objectives : The aim of this study is to investigate the antiallergic effects of YTT on allergic rhinitis by regulation of peroxisome proliferator-activated receptor gamma (PPAR-$gamma$). Methods : The thirty rats were divided into three groups : normal group, control (allergic rhinitis elicited) group, sample (Yeotaectonggi-tang treated after allergic rhinitis elicitation) group. To induce allergic rhinitis in control group and sample group, rats were sensitized intraperitoneally with 0.1% ovalbumin(OVA) solution 3 times at intervals of 1 week. Then intranasal sensitization was performed by diffusing 0.1% ovalbumin(OVA) solution 3 times at intervals of 2 days. After that time rats in sample group were oral administration treated by YTT for 7days. The change of the amounts of eosinophil, substance P, MIP-2, PPAR-$gamma$, IL-4, iNOS were observed in each group. we used the statistical method of ANOVA test(p<0.05). Results : The number of eosinophil in sample group noticeably decreased than control group. And the decrease of substance P and MIP-2 positive reaction were observed in mucosa. YTT inhibited IL-4 and iNOS production, mucus secretion, activation of mast cells and fibrosis remodeling by regulation of PPAR-$gamma$ activation. Conclusion : According to the above results, it is considered that YTT mitigated mucosa damage on the mice model with allergic rhinitis by regulation of PPAR-$gamma$.