An injection blow molding system includes an injection molding station 22, a first delivery section 24, a cooling station 26, a heating station 30, a second delivery section 32 and a plurality of blow molding stations 34. The injection molding station 22 is designed to simultaneously injection mold M rows of N preforms 36 arranged in a second direction B perpendicular to a first direction A in which the preforms 36 are carried. The first delivery section 24 is designed to remove the M rows of preforms 36 injection molded by the injection molding station 22 through a removing mechanism 102 in their upright state while decreasing the pitch in the rows. The preforms 36 are inverted with the column pitch being changed by an inverting mechanism 104 before they are delivered to the cooling station in their inverted state. The cooling and heating stations 26, 30 are designed to cool and heat one row of N preforms 36 while parallel carrying them along a first carrying chain 200. The second delivery section 32 is designed to deliver the preforms 36 to two blow molding stations while they are maintained in their inverted state. Each of the blow molding stations 34 is designed to stretch blow mold the N/2 preforms into containers at the same time.