Abstract: An ice auger adaptor for connecting a portable drill to an ice auger. The adaptor includes a connecting pin having a first end for connection to the chuck of a power drill and a second end configured to install on the shaft of an ice auger. Disposed on the connection pin between the two ends and proximate the first end is a flange. A retaining disc having a center aperture is installed on the connection pin so that it abuts against the flange. The center aperture has a diameter sufficiently larger than the diameter of the connection pin to permit free rotational movement therebetween. The retaining disc also includes two peripheral apertures which can be connected to the ends of an elastomeric retaining cord. The retaining cord has a length such that, when it is wrapped around the body of the drill, the retaining disc and remainder of the adaptor are secured snugly to the drill.