Abstract: The line-illumination device has a carrier (1), a plurality of tubular lamps (2) and a screen (5). Mounting brackets (7), which may be mounted to the screen (5) in any area of its length, are coupled to the screen (5) and to suspension brackets (6), which are coupled to the carrier (1) in a free area thereof. The suspension brackets (6) have a first hole (60) which extends up to the circumference of the bracket, and which may have a narrowed portion adjacent said circumference. A first pin (73) of the mounting brackets (6) is supported in said hole (60) and may be unround so as to be able to pass through the narrowed portion of the hole (60) in a rotational position which is different from rotational positions in which the pin (73) is supported in the hole (60). The construction of the device allows for an easy and fast assembling.