The present invention relates to a fiber for artificial hair having a hollow in a center of a fiber cross section. A ratio of an area of the hollow to an entire area of the fiber cross section is 5% to 50%. The fiber cross section has a flat multilobed shape, and the hollow has a first side and a second side that are inclined 70 to 110 degrees relative to a major axis of the fiber cross section. The present invention also relates to hair ornament products including the above fiber for artificial hair. Thus, the present invention provides a fiber for artificial hair having a favorable curl setting property when curling with a hair iron and a favorable combing property after curling with a hair iron, and hair ornament products including the same.