The present invention relates to a manhole with an improved frame and plugs. According to the invention, the manhole (1) comprises at least two housings (14) provided radially in the inner edge (12), partially delimiting the central opening of the frame (2), and the plug (5) comprises at least two radially outer lugs (13) capable of bearing on the inner edge (12) of the frame (2) when the plug (5) is installed on the frame (2) coaxially to the central opening of the frame (2) in such a way that the annular elastic support (7) of the plug (5) is above the seating rib (6) of the frame (2) without coming into contact with same, and of engaging in the housings (14) of the inner edge (12) by rotating the plug (5) relative to the frame (2) to close the central opening of the frame (2) by means of the plug (5). The invention is applicable in the field of road equipment.