A contact sensor is disclosed. The contact sensor includes a main body and at least one conductor. At least one end of the conductor is disposed on the main body and a contact surface is on one side of the conductor for contact the body surface. The surface of the conductor is in the shape of arc. By the contact surface of the conductor, the contact sensor contacts the human body easily without tangling hair. Moreover, there is not need for the present invention to apply any conductive gel on the body surface so that the measurement of physiological signals is easily and conveniently.本發明係有關於一種接觸式感測裝置,其包含一本體與至少一導體,且導體之至少一端設置於本體,導體之一側具有一接觸面,以接觸人體,其中導體可呈圓弧狀。本發明藉由導體之接觸面可輕易接觸人體而不會纏繞體表之毛髮,且本發明不需再另行塗抹導電膠於人體體表即可進行感測,以方便民眾使用於生理訊號之量測。