A test probe assembly includes: a conductive pipe; a probe inserted in the pipe without contacts and elastically retractable along a lengthwise direction; and an insulation probe supporting member configured to support the probe between an inner wall of the pipe and an outer surface of the probe. The test probe assembly of the present disclosure is improved in noise shield performance and convenient in repairing the probe since the probe is mounted to a probe socket as supported in a metal pipe without contacts.