In a crochet galloon loom, at least a guide reed (12) is rigidly connected to a supporting bar (14) driven in horizontal reciprocating motion, transversely to the longitudinal movement of the needles (2). The guide reed (2) extending horizontally above the needles (2), is provided with a plurality of vertical grooves (15) disposed consecutively in side by side relation and each of them engaging an elastic yarn (11) for guiding it towards a respective needle (2). Each groove (15) of a length corresponding to at least ten times the distance between the lower end (15c) thereof and the lying plane of the needles (2), has a transverse outline in the form of an acute angle so as to impose a precise positioning to the corresponding elastic yarn (11), which is centred to the bisecting line of the angle itself.