The present invention suppresses the spread of a mist of a liquid ejected from a liquid ejection head. Air is blown out toward a printing medium from a blowing-out opening relatively moving together with a print head, as the liquid ejection head, with respect to the printing medium. Air on the printing medium is sucked into a suction opening relatively moving together with the print head with respect to the printing medium. An ink ejection opening of the print head, the blowing-out opening, and the suction opening are arranged in the order from an upstream side to a downstream side in a moving direction of the printing medium with respect to the print head.