A jig for clutching a plurality of probe assemblies each of which has a connecting portion and a soldering portion has a base body and a covering body. The base body has a plurality of first receiving grooves each penetrating a front end and a rear end thereof. The covering body is formed with a plurality of second receiving grooves corresponding to the first receiving grooves. The covering body is openably fixed on the base body, the first receiving grooves and the second receiving grooves are matched to form a plurality of passageways. A front end of each of the passageways has a portion protruded inwards to form a resisting rib. The connecting portions of the probe assemblies are received in the passageways and abut against the resisting ribs, with tip ends of the soldering potions exposing outside the passageways from rear ends of the passageways.