A shell-and-plate heat exchanger, comprising: a shell forming an internal space; and a plate stack housed in the internal space of the shell and including a plurality of heat transfer plates (50a, 50b) stacked and joined together, the shell-and-plate heat exchanger allowing a refrigerant that has flowed into the internal space of the shell to evaporate, wherein the plate stack forms a plurality of refrigerant channels that communicate with the internal space of the shell and allow a refrigerant to flow through and a plurality of heating medium channels that are blocked from the internal space of the shell and allow a heating medium to flow through, each of the refrigerant channels being adjacent to an associated one of the heating medium channels with the heat transfer plate (50a, 50b) interposed therebetween, and the shell-and-plate heat exchanger includes a supply structure configured to supply the refrigerant to the refrigerant channels such that the refrigerant flows downward, characterised in that the supply structure is located inside outer peripheries of the heat transfer plates (50a, 50b) in the plate stack, the supply structure includes a refrigerant introduction channel that passes through the heat transfer plates (50a, 50b) of the plate stack, and a supply hole that allows the refrigerant introduction channel to communicate with the refrigerant channels so that the refrigerant is supplied to the refrigerant channels, the refrigerant introduction channel is formed by the plurality of heat transfer plates (50a, 50b) of the plate stack joined together, and the supply holes penetrate the heat transfer plates (50a, 50b) and open on front and back surfaces of the heat transfer plates (50a, 50b). a shell forming an internal space; and a plate stack housed in the internal space of the shell and including a plurality of heat transfer plates (50a, 50b) stacked and joined together, the shell-and-plate heat exchanger allowing a refrigerant that has flowed into the internal space of the shell to evaporate, wherein the plate stack forms a plurality of refrigerant channels that communicate with the internal space of the shell and allow a refrigerant to flow through and a plurality of heating medium channels that are blocked from the internal space of the shell and allow a heating medium to flow through, each of the refrigerant channels being adjacent to an associated one of the heating medium channels with the heat transfer plate (50a, 50b) interposed therebetween, and the shell-and-plate heat exchanger includes a supply structure configured to supply the refrigerant to the refrigerant channels such that the refrigerant flows downward, characterised in that the supply structure is located inside outer peripheries of the heat transfer plates (50a, 50b) in the plate stack, the supply structure includes a refrigerant introduction channel that passes through the heat transfer plates (50a, 50b) of the plate stack, and a supply hole that allows the refrigerant introduction channel to communicate with the refrigerant channels so that the refrigerant is supplied to the refrigerant channels, a refrigerant introduction channel that passes through the heat transfer plates (50a, 50b) of the plate stack, and a supply hole that allows the refrigerant introduction channel to communicate with the refrigerant channels so that the refrigerant is supplied to the refrigerant channels, the refrigerant introduction channel is formed by the plurality of heat transfer plates (50a, 50b) of the plate stack joined together, and the supply holes penetrate the heat transfer plates (50a, 50b) and open on front and back surfaces of the heat transfer plates (50a, 50b).