In an electric motor cooling structure (20) of a motorcycle, a swing arm (21) includes an electric motor accommodating section (60) configured to accommodate an electric motor (11), and a cooling air intake port (61) opening toward the outside of the electric motor accommodating section (60) and disposed on one side of the electric motor (11), a cooling air outlet port (62) opening toward the outside of the electric motor accommodating section (60) and disposed on the other side of the electric motor (11), and a communication section (63) in communication with the cooling air intake port (61) and the cooling air outlet port (62) and configured to distribute cooling air introduced from the cooling air intake port (61) to both sides of the electric motor (11) are provided in the electric motor accommodating section (60).