A swing-open type package has a box body (10), a lid (12) to be put onto the box body (10) from above, and a swing device connecting the lid (12) and the box body (10), the swing device including a movable rear wall portion (36) formed by a part of a rear wall of the box body (10), and a support flap (44) connecting the lid (12) and a transverse wall (21) of the box body (10), and enables a swing motion of the lid (12) when a front wall of the lid (12) is raised from the boxy body (10) so that the swing motion causes the lid (12) to tilt and open wide.