An endoscope apparatus, which is capable of performing measurement of a subject using a phase-shift method, includes: a main body an insertion portion connected to the main body and a plurality of pattern projection units, each of the plurality of pattern projection units including: a pattern window which is provided in a distal end of the insertion portion and a pattern portion which has a line pattern in which a plurality of lines are periodically disposed with a predetermined period, the lines being parallel to each other, in which: the pattern portions of the plurality of pattern projection units are disposed such that the lines of the line patterns of the pattern portions are parallel to each other, and the line patterns of the pattern portions are shifted from each other by 1/n of 1the predetermined period of the line pattern, where the number of the plurality of pattern projection units assumed to be n (n≧3) and the pattern windows of the plurality of pattern projection units are disposed such that all of the pattern windows have an overlapped portion in a direction perpendicular to the line of the pattern portion.
