To increase the reliability of a walking beam type work carrying device which can be applied to the carrying of parts of an electronic part soldering device.

In this device, a drive part 14 consisting of a horizontal drive mechanism 16 and a vertical drive mechanism 17 is connected to both ends of a pair of right/left long work support beams 13 laid ridingly between heating/ cooling blocks 10, 11 arranged at a certain interval along a work carrying route and a work mounted on the beam is received/delivered between respective blocks by the moving operation of the beam in which one cycle is ascending 1-advancing 2-descending 3-retreating 4 and transferred and carried. A traction spring 18 for absorbing the extension/contraction of the beam 13 by a thermal expansion, a vibration damper 19 for damping a vibration spread from a drive part 14 to the beam 13 and a floating support part 20 for supporting the intermediate position of a long beam from a lower side and restraining the bending by own weight are provided between the end of the work support beam 13 and its drive part 14.