Abstract: An electrically driven dental flossing device which is used for flossing teeth. A flossing assembly is adapted to be mounted to the electrically driven dental flossing device. The dental flossing assembly includes a disposable floss holder which comprises a bow with a stem which in turn is replaceably mounted to a unitary driving shaft adaptor which in turn is mounted to the upper end of the electrically driven dental flossing device. The dental flossing device is gripped in the hand and the thumb is placed over the normally open spring urged thumb switch means. The flossing device works such that the dental floss material on the floss bow moves reciprocally between the teeth when the switch means is activated to energize a motor means within the handle to operate a gearing means which in turn moves the driving shaft adaptor in a reciprocating straight line in a back and forth motion to move the floss bow relative to the interproximal surfaces of the teeth.