The present invention provides a low-cost and highly productive mixing head apparatus that achieves high agitation of a liquid blend and improves the smooth flow of the liquid blend from a discharge port, and a molding method using the same. In the mixing head apparatus wherein two types of chemically reactive fluid component materials 5 are expelled into a chamber interior 10 from fine holes respectively provided in side walls 11 of the chamber so that both component materials 5 impinge on and mix with each other, a plurality ranging from two to four of fine holes 30 are provided for at least one of both component materials 5, center axis lines 35 at distal ends of two or more of the two to four fine holes 30 intersecting with each other in the chamber interior 10, so that jets 50 of the component material expelled from the fine holes 30 with intersecting center axis lines impinge on each other in the chamber interior 10 prior to impingement with the other component material.