Provided is a horizontal blind in which an upper slat group and a lower slat group can respectively be adjusted to different angles relative to each other using a simple structure. A horizontal blind is provided with an angle adjustment mechanism (1), a lifting and lowering mechanism (2), and an angle switching mechanism (3). The angle adjustment mechanism (1) is a mechanism for adjusting the angle of a slat group (4) and comprises ladder cords (1A-1C), drums (11A-11C), a square shaft (12), a gear device (13), and an operating rod (14). The lifting and lowering mechanism (2) is a mechanism for lifting and lowering the slat group (4) and comprises lifting and lowering cords (20A-20C), rollers (21A-21C), a stopper (22) for the lifting and lowering cords, a cord equalizer (23), and an operating cord (24). The angle switching mechanism (3) is a mechanism for selecting the angle of a lower slat group (4A) and comprises switching cords (30A, 30C), rollers (31A, 31C), a stopper (32) for the switching cords, a grip (33), and a grip equalizer (34).