Background and Objective : Allergy is defined as an altered reactivity to an antigen, which can result in pathologic reactions upon subsequent exposure to that particular antigen. This study was to evaluate the effect of oriental materia medica on IL-5 secretion in the mouse spleen cell. Methods : We used the splenocytes of mouse 8 weeks after its birth, and then cultivated those into the 2 experimental groups and a control group for 48 hours. The culture media of the experimental groups were made of $1{mu}g/ml$, $10{mu}g/ml$ oriental materia medica, representative. And the culture media of control group was given no oriental materia medica. Then, we assayed the quantity of cytokine-expression by the sandwich ELISA. The quantities of cytokine-expression of the experimental groups were compared with that of the control group, which was standardized. These methods were used for all of the oriental materia medica treated. Results : Some oriental materia medica inhibit the secretion of IL-5 in both $1{mu}g/ml$ and $10{mu}g/ml$ culture media. These were Acori Rhizoma, Luffae Fasciculus Vascularis, Amomi Rotundi Fructus, Schisandrae Fructus, Biotae Semen, Clematis armandii, Dioscoreae Sativa Rhizoma, Coicis Semen, Sophorae Flos, Oroxyli Semen, Aurantii Semen, Pini Nodi Lignum. Conclusion : This study indicates that some oriental materia medica inhibit the secretion of IL-5 and are beneficial for allergic disease.