A horizontally movable bowling bag is provided to prevent movement of a bowling ball configured such that, in order to prevent movement or falling of the bowling ball when a frame is horizontally moved or when a cover is opened, four or more points of the bowling ball including a lower part of the bowling ball and a bottom surface of the bowling ball along an outer circumference thereof are adjacent to or supported by an upper part of a ball cup provided at the frame and an inner surface of the frame, whereby movement of the bowling ball in the frame is prevented when the frame is horizontally moved.