A conveyor device for conveying test tube holders in a laboratory distribution system is presented. The conveyor device is a screw conveyor device comprising a helical track having a helix axis and a drive shaft having an axis of rotation parallel or coaxial to the helix axis, which drive shaft is adapted to be driven to rotate about the axis of rotation for causing a movement of one test tube holder or a plurality of test tube holders contacting the helical track between an entry region and an exit region. The entry region and the exit region are spaced in a direction of the helix axis. A laboratory distribution system for conveying test tube holders and a laboratory automation system comprising a laboratory distribution system are also presented.