A lifting unit for pipe inspection systems for lifting a head unit, comprising a base support with a connection module for connection to a connection unit of a carriage, a lifting system with at least one lifting arm and a drive unit for deflecting the lifting arm relative to the base support via a rotation axis, as well as a head unit with a connection module for connection of inspection units, in particular cameras and illumination systems, wherein connectors of the carriage are at least partially lead to the connection module of the head unit.