An objective lens unit for an optical pickup device which is composed of a first optical element including a first element body positioned on an optical information recording medium side and a first annular portion formed on the outer periphery of the first element body, and further composed of a second optical element including a second element body and a second annular light source side of the first element body and a second annular portion formed on the outer periphery of the second element body and coupled to the first annular portion, and at least one of the first and second annular portion has a portion in which the size of outer shape is smaller than the vicinity on at least a part of the light source side.