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 . <EOS>