According to an embodiment, an electronic device comprises: a first housing, a second housing, a hinge module pivotably connecting the first housing and the second housing, and a flexible display disposed from a surface of the first housing through an area where the hinge module is disposed to a surface of the second housing. The hinge module may include: a detent hinge at least partially receiving a pair of rotation shafts and including a cam-shaped cam surface formed in a direction perpendicular to a rotation axis of the rotation shaft, a roller contacting the cam surface and disposed to rotate corresponding to the cam shape, at least one elastic member including an elastic material formed to provide an elastic force disposed in the direction perpendicular to the rotation axis of the rotation shaft and configured to deliver an elastic force to the roller, and a detent bracket including the pair of shafts and defining a space for receiving the roller and the at least one elastic member.