The invention discloses a skin testing device. The skin testing device comprises a machine body and a testing head arranged on the upper end of the machine body, wherein the testing head comprises a testing end face, the testing end face is provided with sensors, the sensors comprise an inner sensor and an outer sensor, the inner sensor and the outer sensor have the same center shaft, and at least part of the outer sensor surrounds the periphery of the inner sensor. The skin testing device has the advantages that the design is elaborate, the structure is reasonable, the operation is convenient, various physiological parameters of the skin water content and the skin oil content can be measured at the same time through the arrangement of the various sensors, through the reasonable arrangement of the shapes of the sensors, the two sensors are fully combined together to enable the two sensors to have an overlapped or partially overlapped detecting area at the same time, the space is reasonably used through the arrangement, the area of the testing head is made to be minimum to meet the testing requirements of areas including the hands and the face, and meanwhile the testing precision can be guaranteed.