A vehicle air-conditioning apparatus comprising: a blower unit, the blower unit including: a scroll casing including a first wall having an intake port; a second wall facing the first wall; and a peripheral wall connecting peripheral edge portions of the first wall and the second wall, and an impeller rotatably provided in the scroll casing; a motor having a revolving shaft configured to rotate the impeller and to be mounted on the second wall; a blow-out flow channel provided between a bending end portion of the scroll casing and a tongue portion of the scroll casing; and a motor cooling air introduction chamber provided outside the tongue portion, wherein the motor cooling air introduction chamber is in communication with the blow-out flow channel via an air intake port opening in a peripheral wall of the tongue portion facing the blow-out flow channel at a position more closer to the first wall side than an inner wall surface of the second wall, characterized in that the blow-out flow channel is provided with at least one airflow regulating rib (71, 72) facing the peripheral wall provided with the air intake port, and the airflow regulating rib (71, 72) projects from an inner wall surface of the second wall and having a top portion (71a, 72a) in the blow-out flow channel wherein the airflow regulating ribs (71,72) are plate-shaped projections with an elongated shape in plan view viewed from top portions (71a, 72a) side, and in which both side surfaces are curved surfaces wherein a plurality of the airflow regulating ribs (71, 72) are arranged along an air flow, and the plurality of airflow regulating ribs (71, 72) are arranged in descending order according to the height from a peripheral wall side provided with the air intake port, wherein the maximum height of the rib arranged adjacent to the peripheral wall provided with the air intake port out of the airflow regulating ribs (71, 72) is lower than the minimum height of the end portion of the air intake port on the second wall side and is not lower than Hb - 10 mm where Hb [mm] is the minimum height of the end portion of the air intake port on the second wall side. a blower unit, the blower unit including: a scroll casing including a first wall having an intake port; a second wall facing the first wall; and a peripheral wall connecting peripheral edge portions of the first wall and the second wall, and an impeller rotatably provided in the scroll casing; a motor having a revolving shaft configured to rotate the impeller and to be mounted on the second wall; a blow-out flow channel provided between a bending end portion of the scroll casing and a tongue portion of the scroll casing; and a motor cooling air introduction chamber provided outside the tongue portion, wherein a scroll casing including a first wall having an intake port; a second wall facing the first wall; and a peripheral wall connecting peripheral edge portions of the first wall and the second wall, and an impeller rotatably provided in the scroll casing; a motor having a revolving shaft configured to rotate the impeller and to be mounted on the second wall; a blow-out flow channel provided between a bending end portion of the scroll casing and a tongue portion of the scroll casing; and a motor cooling air introduction chamber provided outside the tongue portion, wherein the motor cooling air introduction chamber is in communication with the blow-out flow channel via an air intake port opening in a peripheral wall of the tongue portion facing the blow-out flow channel at a position more closer to the first wall side than an inner wall surface of the second wall, characterized in that the blow-out flow channel is provided with at least one airflow regulating rib (71, 72) facing the peripheral wall provided with the air intake port, and the airflow regulating rib (71, 72) projects from an inner wall surface of the second wall and having a top portion (71a, 72a) in the blow-out flow channel wherein the airflow regulating ribs (71,72) are plate-shaped projections with an elongated shape in plan view viewed from top portions (71a, 72a) side, and in which both side surfaces are curved surfaces wherein a plurality of the airflow regulating ribs (71, 72) are arranged along an air flow, and the plurality of airflow regulating ribs (71, 72) are arranged in descending order according to the height from a peripheral wall side provided with the air intake port, wherein the maximum height of the rib arranged adjacent to the peripheral wall provided with the air intake port out of the airflow regulating ribs (71, 72) is lower than the minimum height of the end portion of the air intake port on the second wall side and is not lower than Hb - 10 mm where Hb [mm] is the minimum height of the end portion of the air intake port on the second wall side.