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 in a lateral direction and joined together, and 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, each of the heat transfer plates (50a, 50b) includes: a first communication hole (52a, 52b) that communicates with the heating medium channels and introduces the heating medium into the heating medium channels; and a second communication hole (54a, 54b) formed below the first communication hole (52a, 52b) and communicates with the heating medium channels to emit the heating medium out of the heating medium channels, and a guide crossing between the first communication hole (52a, 52b) and the second communication hole (54a, 54b) is provided for the heating medium channels to guide the heating medium that has flowed into the heating medium channels from the first communication hole (52a, 52b) toward side portions of the heat transfer plate (50a, 50b); and characterized in that a lower end of the guide is located below an upper end of the second communication hole (54a, 54b). 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 in a lateral direction and joined together, and 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, each of the heat transfer plates (50a, 50b) includes: a first communication hole (52a, 52b) that communicates with the heating medium channels and introduces the heating medium into the heating medium channels; and a second communication hole (54a, 54b) formed below the first communication hole (52a, 52b) and communicates with the heating medium channels to emit the heating medium out of the heating medium channels, and a guide crossing between the first communication hole (52a, 52b) and the second communication hole (54a, 54b) is provided for the heating medium channels to guide the heating medium that has flowed into the heating medium channels from the first communication hole (52a, 52b) toward side portions of the heat transfer plate (50a, 50b); and characterized in that a lower end of the guide is located below an upper end of the second communication hole (54a, 54b). a first communication hole (52a, 52b) that communicates with the heating medium channels and introduces the heating medium into the heating medium channels; and a second communication hole (54a, 54b) formed below the first communication hole (52a, 52b) and communicates with the heating medium channels to emit the heating medium out of the heating medium channels, and a guide crossing between the first communication hole (52a, 52b) and the second communication hole (54a, 54b) is provided for the heating medium channels to guide the heating medium that has flowed into the heating medium channels from the first communication hole (52a, 52b) toward side portions of the heat transfer plate (50a, 50b); and characterized in that a lower end of the guide is located below an upper end of the second communication hole (54a, 54b).