The present invention relates to a walking assist device which has been devised to provide a completely different type of walking assist device in effort to resolve the shortcomings or inconveniences in use of the conventional devices. The walking assist device of the present invention is provided with a main walker unit having a body member with a hollow portion in which a main walker's foot can be penetrated and fixed; and a sub-walker unit that is interconnected with said main walker unit and fixes a sub-walker's foot.