To obtain a boiling splashing type vaporization heat exchanger capable of improving vaporization performance.

A boiling splashing type vaporization heat exchanger 10 comprises a plurality of heat transfer tubes 38 and fins 40. A lowest stage boiling heat transfer tube 38A is inserted into an axial core of a boiling heat transfer tube insertion hole 46A, formed at a lower end of the fins 40 in a non-contact manner and is not joined. Thus, heat from the boiling heat transfer tube 38A is not transferred to the fins 40, and directly locally heats a stored refrigerant 17 located above the boiling heat transfer tube 38A. Therefore, the boiling evaporation efficiency and furthermore vaporization performance are improved.