An air-sending device, comprising: a propeller fan comprising a shaft portion disposed on a rotation axis of the propeller fan; and a blade disposed on an outer peripheral side of the shaft portion, and including a leading edge and a trailing edge; a fan motor that drives the propeller fan, and a support element that includes a motor fixing portion to which the fan motor is fixed, and a support portion that supports the motor fixing portion, the motor fixing portion of the support element having a rectangular frame shape extending in the vertical direction, wherein the blade includes a negative pressure surface in which a plurality of recesses (30, 30a, 30b, 30c, 30d, 30e) are formed, and the plurality of recesses (30, 30a, 30b, 30c, 30d, 30e) include a first recess and a second recess disposed on the trailing edge side of the first recess in a circumferential direction about the rotation axis as a center, and wherein the first recess has a depth larger than a depth of the second recess, the air-sending device being characterised in that the support portion of the support element includes two upper support portions, extending upward from the motor fixing portion in parallel, and two lower support portions, extending downward from the motor fixing portion in parallel, the upper support portions and the lower support portions being substantially arranged on the extension lines of the long sides of the motor fixing portion, and in that, when viewed in a direction parallel to the rotation axis, the plurality of recesses (30, 30a, 30b, 30c, 30d, 30e) are formed only in an inner peripheral side of a minimum circle that surrounds the motor fixing portion about the rotation axis as a center. a propeller fan comprising a shaft portion disposed on a rotation axis of the propeller fan; and a blade disposed on an outer peripheral side of the shaft portion, and including a leading edge and a trailing edge; a fan motor that drives the propeller fan, and a support element that includes a motor fixing portion to which the fan motor is fixed, and a support portion that supports the motor fixing portion, the motor fixing portion of the support element having a rectangular frame shape extending in the vertical direction, wherein the blade includes a negative pressure surface in which a plurality of recesses (30, 30a, 30b, 30c, 30d, 30e) are formed, and the plurality of recesses (30, 30a, 30b, 30c, 30d, 30e) include a first recess and a second recess disposed on the trailing edge side of the first recess in a circumferential direction about the rotation axis as a center, and wherein the first recess has a depth larger than a depth of the second recess, the air-sending device being characterised in that the support portion of the support element includes two upper support portions, extending upward from the motor fixing portion in parallel, and two lower support portions, extending downward from the motor fixing portion in parallel, the upper support portions and the lower support portions being substantially arranged on the extension lines of the long sides of the motor fixing portion, and in that, when viewed in a direction parallel to the rotation axis, the plurality of recesses (30, 30a, 30b, 30c, 30d, 30e) are formed only in an inner peripheral side of a minimum circle that surrounds the motor fixing portion about the rotation axis as a center.