An electric motorcycle in which a power drive unit, a motive power generation motor, etc. can be efficiently cooled is provided.An electric motorcycle 1 in which a PDU 18 and a motive power generation motor 16 for traveling are secured to a swing arm 13 swinging around a pivot shaft 12 and power from a battery 9 is supplied through the PDU 18 to the motive power generation motor 16, characterized in a hollow inside of the swing arm 13 is partitioned into an air introducing space 24 and an equipment fixing space 23 by a partition wall 25a, the PDU 18 is secured in the equipment fixing space 23 so as to be in close contact with the partition wall 25a, and a fin 40 extending from the partition wall 25a to the air introducing space 24 are formed at a portion in the air introducing space 24 which corresponds to the fixed portion of the PDU 18.