An integrated circuit device such as an integrated circuit memory device, includes a first fuse group such as a first laser fuse group including a plurality of first laser fuses each having a first narrow end, a second opposite end which is wider and a bent central portion. Pitches of the first end of the plurality of first laser fuses are narrow and pitches of the second end are wide. The plurality of first laser fuses are adjacent one another. A second fuse group such as a second laser fuse group includes a plurality of second laser fuses each having a first wide end, a second opposite end which is narrower, and a bent central portion. Pitches of the first end of the plurality of second laser fuses are wide and pitches of the second end are narrow. The second plurality of laser fuses are adjacent one another. The first ends of the laser fuses in the first laser fuse group are adjacent the first ends of laser fuses in the second laser fuse group. The second ends of the laser fuses in the first laser fuse group are adjacent the second ends of the laser fuses in the second laser fuse group. The central portions of the outer laser fuses of the first and second laser fuse groups are not bent, but straight. Accordingly, when a specific laser fuse is blown, neighboring laser fuses need not be damaged, and the density of the laser fuse area may be increased.