Electrical probe

An electrical probe includes a probe assembly and a second electrical connector. The probe assembly includes a needle cylinder, a first electrical connector, a probe head, and a sub-probe. The first electrical connector and the probe head are disposed on two opposite sides of the needle cylinder. The first electrical connector and the probe head is electrically connected to the needle cylinder. The probe head is configured to press an analyte. The probe head is penetrated by the sub-probe, and the sub-probe is plugged into the needle cylinder to electrically connect to a wire and electrically isolated to the needle cylinder. The sub-probe is located on the side far away from the first electrical connector. The second electrical connector is corresponding to the first electrical connector. When the probe head is pressed on the analyte, the needle cylinder drives the first cylinder to a connecting position in order to allow the first electrical connector electrically to contact with the second electrical connec