Cordyceps cicadae (C. cicadae) is one of the most important medicinal mushrooms and have been used for about 1,600 years. In this study, we publish the results of researching the effect of liquid extract from C. cicadae on Swiss white mice. Experimental mouse groups were given drinking fungus liquid extracted by water (group 1) or by alcohol (group 2) with the dose of 250 μl/mouse/per day equal to 780 mg dried fungus/kg of body weight while control group was given drinking distilled water for 4 weeks. The results indicated that the survival rate of experimental mouse groups was 100%. The highest growth rate in terms of weight was group 1, followed by group 2 and control group was lowest. Swimming time of mice in drinking fungus liquid extracted by water or by alcohol groups was longer than that of control group, its ratios in comparison with control are 161.22% and 177.26% respectively. We did not detect any unusually characteristics in further anatomical studies.Nghiên cứu ảnh hưởng của dịch chiết quả thể nấm dược liệu Cordyceps cicadae lên chuột nhắt trắng Swiss. Kết quả nghiên cứu cho thấy các nhóm chuột thí nghiệm tỷ lệ sống là 100%. Tăng trưởng về khối lượng ở nhóm 1 và nhóm 2 uống dịch chiết nấm lâu hơn so với nhóm đối chứng, tỷ lệ thời gian bơi so với nhóm đối chứng là la 161,15% và 172,12%. Đặc điểm giải phẫu không ghi nhận bất thường.