Safety seat for land vehicles, aircraft and watercraft, including a strap framework for holding a sitting portion and comprising vertically extending support straps anchored to a vehicle and embodied as loops stretching between vehicle-mounted anchors above and below the sitting portion, which is secured to a support frame provided with two braces oriented in the direction of extension of the support straps. For securement of the support frame to the strap framework, a front strap or rear strap of each support strap loop is divided into two strap sections, one extending between the support frame and an anchor disposed above the sitting portion, and the other extending between the support frame and an anchor disposed below the sitting portion. Ends of the strap sections associated with the support frame are retained at the braces of the support frame and hold the support frame under tension in a vertical orientation.