Abstract: A yarn splicing device and method provides for overlapping yarn ends from different spools or packages of yarn to form a smooth, continuous splice. The device allows the operator to place the different yarn ends in a pair of clamps that are separated by a pneumatic commingling jet. After the yarn is clamped into place the yarn ends, which consist of multi-filament yarns, are pneumatically commingled and thereafter the clamps are rotated in opposite directions from the commingling jet to stretch the splice junction to reduce the diameter thereof. Thereafter the clamps release the spliced yarn so it is available for removal and further processing such as texturizing. The splicing method described provides a fast, efficient method which provides for uniform yarn diameter which does not slow or obstruct other yarn processing steps by snagging or breaking at the splice junction.