A semiconductor device includes a substrate having first and second regions, a first fin-type pattern and a second fin-type pattern formed in the first region and extending in a first direction, and a third fin-type pattern and a fourth fin-type pattern formed in the second region and extending in a third direction. A first source/drain is formed on the first fin-type pattern and a second source/drain region is formed on the second fin-type pattern. Each of first and second source/drains have a cross section defining a same convex polygonal shape. A third source/drain is formed on the third fin-type pattern and a fourth source/drain region is formed on the fourth fin-type pattern. Cross-sections of the third and fourth source/drains define different convex polygonal shapes from one another.