A lamp support of the present invention comprises a keel as the main body, two arc-shaped extensions provided on two sides of the keel, inwardly protruding lips correspondingly provided on bottom edges of the arc-shaped extensions, and first and second slots provided on the ridge of the keel and arranged perpendicular to each other. The first and second slots can allow for the passage of screws so that the screws can be used to secure the entire lamp support to an assembly main body such as a ceiling or a wall; and the lips correspondingly fit into grooves on both sides of a lamp tube whereby the lamp tube is pushed into a predetermined position to secure the lamp tube to the assembly main body such as a ceiling or a wall.