PURPOSE: To provide the titled mold for cutting off a gate when a resin product is taken out from the mold, constitutd from such a mechanism that a gate block forming a thin walled gate having a long width is supported by a pin piercing a core die main body to be moved to approaching and parting directions.

CONSTITUTION: A thin walled gate having a long dimension is formed between a core die main body 2 and a gate block 14 which is, in turn, supported by the core die main body 2 through a pin 13. Pushing plates 17, 18 are brought into engagement with the pin 13 and driven so as to move the gate block 14 to approaching and parting directions with respect to the core die main body 2.