1. A recording medium used for an information recording or reading apparatus, comprising: a recording surface to record thereon information; and position information, which is formed on said recording surface, for recognizing a position on said recording surface, said position information including: at least two first line segments, which are parallel to each other, formed by giving physical features which are different from those of other part on said recording surface; and at least one second line segment formed by giving physical features which are different from those of other part on said recording surface, the first line segments and the second line segment being disposed such that at least one of the first line segments or an extension line of at least one of the first line segments crosses the second line segment or an extension line of the second line segment.