A new spray rose cultivar ‘Red Zen’ was bred from the cross between dark pink spray cultivar ‘Dollina’ and orange spray cultivar ‘Alegria’ at the National Institute of Horticulture & Herbal Science. The cross was made in 2007 and ‘Red Zen’ was finally selected in 2011 after investigating characteristics for four years from 2009 to 2011. ‘Red Zen’, a red spray cultivar grows vigorously and has good and big shape. The major characteristics of this cultivar are 116.0 stems/㎡/year in yield, 72.5±7.0 cm in length of cut flower, 6.0±0.1 cm in flower diameter, 22.5±2.5 in petal number, and 11.8±1.2 days in vase life. This cultivar can be propagated by both cutting and grafting. The consumer’s preference of this cultivar is relatively higher than that of control cultivar, ‘Little Mable’.