The recording head is formed with ejection holes including first ejection holes and second ejection holes arranged in a first direction. A recording medium has virtual columns extending in the first direction and virtual rows extending in a second direction orthogonal to the first direction. The virtual columns have first virtual columns and second virtual columns alternately arranged in the second direction. The scanning unit performs a first scan and a second scan in the second direction. The controller prevents the recording head in the first scan from ejecting ink droplets from the first ejection holes onto the first virtual columns and from the second ejection holes onto the second virtual columns, and prevents the recording head in the second scan from ejecting ink droplets from the first ejection holes onto the second virtual columns and from the second ejection holes at the first virtual columns.