A construction machine comprising: an engine chamber; an engine disposed in the engine chamber; a heat exchanger disposed in the engine chamber; an intake chamber communicated with the engine chamber and disposed independently of the engine chamber; a cooling fan that sucks air outside the intake chamber into the engine chamber through the intake chamber to make the air pass through the heat exchanger; and a dust receiving part, characterized by an intake tube connected to the intake chamber so as to provide communication between an inside and an outside of the intake chamber, wherein: the intake tube includes a connection part connected to the intake chamber, an intake port opened to the outside of the intake chamber, and a curved part having an inner wall surface positioned between the intake port and the connection part and curved, the inner wall surface including an outside inner wall surface allowing dust contained in the air sucked through the intake port to come into contact with the inner wall surface, the outside inner wall surface being the inner wall surface of an outside wall part of an outer wall constituting the intake tube, the outside wall part having a length larger than the length of a central axis of the intake tube in a section including the central axis; the dust receiving part is disposed downstream of the outside inner wall surface so as to receive dust that has come into contact with the outside inner wall surface of the curved part to prevent the dust from entering the intake chamber; and the dust receiving part is defined by a partition plate, which partitions the inside of a downstream section that is a section from the curved part to the connection part in the intake tube into a dust receiving space for receiving the dust and a space other than the dust receiving space, and the outside wall part of the downstream section. an engine chamber; an engine disposed in the engine chamber; a heat exchanger disposed in the engine chamber; an intake chamber communicated with the engine chamber and disposed independently of the engine chamber; a cooling fan that sucks air outside the intake chamber into the engine chamber through the intake chamber to make the air pass through the heat exchanger; and a dust receiving part, characterized by an intake tube connected to the intake chamber so as to provide communication between an inside and an outside of the intake chamber, wherein: the intake tube includes a connection part connected to the intake chamber, an intake port opened to the outside of the intake chamber, and a curved part having an inner wall surface positioned between the intake port and the connection part and curved, the inner wall surface including an outside inner wall surface allowing dust contained in the air sucked through the intake port to come into contact with the inner wall surface, the outside inner wall surface being the inner wall surface of an outside wall part of an outer wall constituting the intake tube, the outside wall part having a length larger than the length of a central axis of the intake tube in a section including the central axis; the dust receiving part is disposed downstream of the outside inner wall surface so as to receive dust that has come into contact with the outside inner wall surface of the curved part to prevent the dust from entering the intake chamber; and the dust receiving part is defined by a partition plate, which partitions the inside of a downstream section that is a section from the curved part to the connection part in the intake tube into a dust receiving space for receiving the dust and a space other than the dust receiving space, and the outside wall part of the downstream section. the intake tube includes a connection part connected to the intake chamber, an intake port opened to the outside of the intake chamber, and a curved part having an inner wall surface positioned between the intake port and the connection part and curved, the inner wall surface including an outside inner wall surface allowing dust contained in the air sucked through the intake port to come into contact with the inner wall surface, the outside inner wall surface being the inner wall surface of an outside wall part of an outer wall constituting the intake tube, the outside wall part having a length larger than the length of a central axis of the intake tube in a section including the central axis; the dust receiving part is disposed downstream of the outside inner wall surface so as to receive dust that has come into contact with the outside inner wall surface of the curved part to prevent the dust from entering the intake chamber; and the dust receiving part is defined by a partition plate, which partitions the inside of a downstream section that is a section from the curved part to the connection part in the intake tube into a dust receiving space for receiving the dust and a space other than the dust receiving space, and the outside wall part of the downstream section.