The invention relates to a device (1) for detecting and/or influencing posture, comprising a flexible support element (2), on which a fixing unit (3) for arranging the device (1) at the waist height of a wearer of the device (1) is arranged. First ends (41, 51) of the tension straps (4, 5) are fastened to the fixing unit (3) and guided so as to cross each other in the back area, second ends (42, 52) of the tension straps being fastened to the support element (2) in the frontal shoulder or chest area.
