Radioprotective screen for protecting at least one operator from ionizing radiation, said screen comprising a front wall structure made of radioprotective material(s) and a lateral wall structure made of radioprotective material(s) linked to one another at a vertical or essentially vertical corner edge, said screen comprising a base provided with ground support wheels, said front wall structure comprising a lower part and an upper part which can be moved relative to one another, said upper part of said front wall structure being mounted pivotally around a vertical or essentially vertical pivoting axis at said corner edge, the lateral wall structure extending in a vertical or essentially vertical plane and comprising: - a free lateral edge, - a lateral edge defining a part of said corner edge, - a lower edge, and - an upper edge, said lateral wall structure comprising an upper part, at least a part of which is made of transparent radioprotective material, and a lower part, the lower part of the front wall structure being defined by: - a free lateral edge, - a lateral edge defining a part of said corner edge, - a lower edge, and - an upper edge, said lower part of the front wall structure extending in a vertical or essentially vertical plane which is offset with respect to the plane of said lateral wall structure by a fixed angle between 70° and 120°, preferably in the order of 90°, characterized in that it comprises a part made of flexible radioprotective material which is shaped as a panel that extends: - over a part of the height of said corner edge, and - over a part of said lower part of the lateral wall structure as well as over a part of the lower part of the front wall structure at both sides of said corner edge. said front wall structure comprising a lower part and an upper part which can be moved relative to one another, said upper part of said front wall structure being mounted pivotally around a vertical or essentially vertical pivoting axis at said corner edge, the lateral wall structure extending in a vertical or essentially vertical plane and comprising: - a free lateral edge, - a lateral edge defining a part of said corner edge, - a lower edge, and - an upper edge, said lateral wall structure comprising an upper part, at least a part of which is made of transparent radioprotective material, and a lower part, the lower part of the front wall structure being defined by: - a free lateral edge, - a lateral edge defining a part of said corner edge, - a lower edge, and - an upper edge, said lower part of the front wall structure extending in a vertical or essentially vertical plane which is offset with respect to the plane of said lateral wall structure by a fixed angle between 70° and 120°, preferably in the order of 90°, characterized in that it comprises a part made of flexible radioprotective material which is shaped as a panel that extends: - over a part of the height of said corner edge, and - over a part of said lower part of the lateral wall structure as well as over a part of the lower part of the front wall structure at both sides of said corner edge. - over a part of the height of said corner edge, and - over a part of said lower part of the lateral wall structure as well as over a part of the lower part of the front wall structure at both sides of said corner edge.