In an optical touch panel including a first group of light emitting and receiving packages and a second group of light emitting and receiving packages provided on a display surface at opposite sides to each other, each of the light emitting and receiving packages is formed by one light emitting element and one light receiving element vertically arranged above the display surface. The light emitting element of each light emitting and receiving package of the first group opposes the light receiving element of one light emitting and receiving package of the second group, and the light emitting element of each light emitting and receiving package of the second group opposes the light receiving element of one light emitting and receiving package of the first group.