the tongue may be gold plated for improved electrical contact inspection device 10 of the present invention comprises connector retainer 12 and probe holder 17 mounted on base 11 connector retainer 12 is fixed and probe holder 17 moves on rails 15 between a separated position and a test position holder body 13 is provided with keeper 16 which comprises stop plate 14 with a u shaped opening therein and grooves 16a adjacent thereto guide shafts 18 are provided with springs 19 whereby when probe holder 17 is in the test position it is urged toward the separated position probe holder 17 contains probe pins 23 which correspond to cavities 3 and terminals 4 of connector 2 the distance between the side walls of holder body 13 is approximately the same as the width of connector housing 2 similarly the distance between the bottoms of grooves 16a is substantially the same as the width of ribs 2a of connector 1 ribs 2a of connector 1 are inserted into grooves 16a from above as can be seen in fig1 the axes of terminals 4 will then be oblique to the axes of probe pins 23 stop plate 14 cooperating with grooves 16a serves to retain connector 1 in connector retainer 12 referring to fig3 and 4 probe holder 17 is moved into the test position probes 21 are located in recess 20 having stepped portion 20a in fig3 the tips of probes 23 are shown just as they enter spaces 7 and before contacting terminals 4 in fig4 probe holder.