A blower (10, 110) comprising a fan (30,130) and a motor, wherein the motor includes: a shaft including an axis; a bearing that supports the shaft; and a motor case that covers at least a part of the bearing, the fan (30,130) includes: a main plate having a first surface facing the motor case and a second surface opposite to the first surface, and connected to the shaft; and a plurality of blades erected on the second surface of the main plate, and arranged radially with respect to the axis included in the shaft, at least one of the fan (30,130) and the motor case includes one or more blocking members (42, 43), and the one or more blocking members (42, 43) are located apart from the shaft in a radial direction orthogonal to the axis between the first surface of the main plate and the motor case, and surround the shaft, wherein in the main plate, one or more through holes penetrating between the first surface and the second surface are formed between the axis included in the shaft and a region where the plurality of blades are erected, characterized in that the one or more blocking members (42, 43) are disposed at positions closer to the shaft than the one or more through holes are, so as to be configured to prevent minute foreign matters from entering the bearing through the space between the main plate and the motor case. a shaft including an axis; a bearing that supports the shaft; and a motor case that covers at least a part of the bearing, the fan (30,130) includes: a main plate having a first surface facing the motor case and a second surface opposite to the first surface, and connected to the shaft; and a plurality of blades erected on the second surface of the main plate, and arranged radially with respect to the axis included in the shaft, at least one of the fan (30,130) and the motor case includes one or more blocking members (42, 43), and the one or more blocking members (42, 43) are located apart from the shaft in a radial direction orthogonal to the axis between the first surface of the main plate and the motor case, and surround the shaft, wherein in the main plate, one or more through holes penetrating between the first surface and the second surface are formed between the axis included in the shaft and a region where the plurality of blades are erected, characterized in that the one or more blocking members (42, 43) are disposed at positions closer to the shaft than the one or more through holes are, so as to be configured to prevent minute foreign matters from entering the bearing through the space between the main plate and the motor case. a main plate having a first surface facing the motor case and a second surface opposite to the first surface, and connected to the shaft; and a plurality of blades erected on the second surface of the main plate, and arranged radially with respect to the axis included in the shaft, at least one of the fan (30,130) and the motor case includes one or more blocking members (42, 43), and the one or more blocking members (42, 43) are located apart from the shaft in a radial direction orthogonal to the axis between the first surface of the main plate and the motor case, and surround the shaft, wherein in the main plate, one or more through holes penetrating between the first surface and the second surface are formed between the axis included in the shaft and a region where the plurality of blades are erected, characterized in that the one or more blocking members (42, 43) are disposed at positions closer to the shaft than the one or more through holes are, so as to be configured to prevent minute foreign matters from entering the bearing through the space between the main plate and the motor case.