Purpose: Evaluation of soft tissue response following chin advancement using two different genioplasty techniques. Methods: The study included 8 adult patients whom divided equally into two groups; group I was surgically treated by sliding genioplasty and group II was surgically treated by chin shield genioplasty for correction of retruded or deficient chin. Lateral cephalograms were taken at 2 times; immediately pre-operative and 6months post-operative. Results: The mean change of soft tissue pogonion (Pg') was 4.7mm (+ 0.3) in group I, while in group II the mean change of soft tissue pogonion (Pg') was 6.2mm (+4.8).The mean change in the labiomental depth in group I was 0.9mm (+0.3), while in group II it was 0.2mm (+0.5). So the group II, chin shield genioplasty contributed to a less labiomental fold depth. The ratio of soft tissue response to bony movement in the sliding genioplasty technique was 1:0.83 while in the chin shield genioplasty technique it was 1:0.99. Conclusion: In the chin shield genioplasty technique the increase in labiomental fold depth was less than the sliding genioplasty technique.