To provide a casting device which provides a high quality cylindrical product having good precision by preventing the deformation of a core, and a casting method thereof.

In the case device 100 for executing the casting by holding a resin core 37 in a mold 35 and pouring molten metal into a cavity 39 formed between the mold and the resin core, the mold 5 is formed with the resin and a part of the mold is used for a holding part for holding the resin core 37. In this way, the high positional precision between the resin-made holding part and the resin core 37 is obtd. and the high quality cylindrical product is accordingly produced.