The invention relates to a device for medical examination and belongs to the medical apparatus field. The device comprises a sealing barrel, a liquid extraction pipe, a liquid extraction hole, a first concave table, a first gasket, a first inner thread, a pressure discharging hole, a pressure discharging pipe, a second concave table, a second gasket, a second inner thread, a filler, a push pull rod and an outer thread. The device is characterized in that, the sealing barrel is a transparent glass barrel having an opening facing downwards, the middle position of the sealing barrel is provided with the pressure discharging hole, the lower portion of the sealing barrel is provided with the liquid extraction hole, the outer side of the liquid extraction hole is provided with the liquid extraction pipe which is communicated with the sealing barrel through the liquid extraction hole. The device has a simple structure, is convenient and practical, realizes combination of all parts for use, can extract tissue fluid under a damaged skin for examination on the condition that secondary damage to the skin is avoided, can mitigate pain of a patient and reduces the skin wound surface to the maximum degree.