A characteristic feature of the proposed shuttering is the fact that its adjacent sections are interconnected through means preventing them from being mutually inclined in a vertical plane; said means is interposed between said sections and is made as a bar and four links mounted in pairs on pivots at the bar ends, while ends of the links are connected, through ball-and-socket joints, to the respective sections; said bar being composed of at least two members swivelling with respect to each other about a common longitudinal axis.