This invention relating to a chair-shaped device for pulling a lumbar vertebra can pull the waist holding unit (6) at the correct pulling angle without tightening waist holding unit (6) strongly. It includes an upper body holding unit (7) to hold user's upper body on a backrest (2), a waist holding unit (6) to hold the user's waist, a separating drive unit (5) to separate the backrest (2) and a seat (1) including the loin guard (8) from each other, and a waist pulling unit (11) to pull the waist holding unit (6) toward user's buttock side, and the upper body holding unit (7) can be moved along the backrest (2) in order to adjust the proper position for users' height and the waist pulling unit (11) pulls the waist holding unit (6) in a predetermined angle against the backrest (2) with the seat (1) keeping user's lower body.