Multi-purpose accessory support for cooking food in an oven, comprising: - a frame (2B, 2B', 2B") and - at least one accessory (5, 5', 5", 5′′′) capable of being supported by two opposite sides of said frame (2B, 2B', 2B"), said support being characterised in that the frame (2B, 2B', 2B") has the overall shape of a square or a rectangle and made of two pieces (3, 3', 3") assembled together in a detachable and/or collapsible manner and in that the two parts (3, 3', 3") have an overall C-shape and are assembled together by two connecting members (4, 4', 4") so as to form said frame (2B, 2B', 2B"), said two pieces (3, 3', 3") comprising at least one first rod (31, 31', 31") and two second rods (32, 32', 32") each originating from each end of the first rod (31, 31', 31") and extending in the same direction parallel to one another in such a way that the longitudinal axes of the first and second rods (31, 31', 31"; 32, 32', 32") lie in the same plane P or P' or P", and two third rods (33, 33', 33") each originating from the free end of one of the second rods (32, 32', 32") and extending in the same direction perpendicularly to said plane P or P' or P", each of said two connecting members (4, 4', 4") comprising: - an overall parallelepipedal body (40, 40', 40") comprising a vertical front face (42, 42', 42"), a vertical rear face (43, 43', 43"), two vertical side faces (44, 44', 44") joining said front (42, 42', 42") and rear (43, 43', 43") faces, and a horizontal top face (45, 45', 45") and a horizontal bottom face (46, 46', 46") connecting said front (42, 42', 42"), rear (43, 43', 43") and side (44, 44', 44") faces together, and - two grooves (41, 41', 41") having a shape complementary to at least part of one of the associated second rods (32, 32', 32") and third rods (33, 33', 33") of said two pieces (3, 3', 3") and being arranged on said body (40, 40', 40"). - a frame (2B, 2B', 2B") and - at least one accessory (5, 5', 5", 5′′′) capable of being supported by two opposite sides of said frame (2B, 2B', 2B"), said support being characterised in that the frame (2B, 2B', 2B") has the overall shape of a square or a rectangle and made of two pieces (3, 3', 3") assembled together in a detachable and/or collapsible manner and in that the two parts (3, 3', 3") have an overall C-shape and are assembled together by two connecting members (4, 4', 4") so as to form said frame (2B, 2B', 2B"), said two pieces (3, 3', 3") comprising at least one first rod (31, 31', 31") and two second rods (32, 32', 32") each originating from each end of the first rod (31, 31', 31") and extending in the same direction parallel to one another in such a way that the longitudinal axes of the first and second rods (31, 31', 31"; 32, 32', 32") lie in the same plane P or P' or P", and two third rods (33, 33', 33") each originating from the free end of one of the second rods (32, 32', 32") and extending in the same direction perpendicularly to said plane P or P' or P", each of said two connecting members (4, 4', 4") comprising: - an overall parallelepipedal body (40, 40', 40") comprising a vertical front face (42, 42', 42"), a vertical rear face (43, 43', 43"), two vertical side faces (44, 44', 44") joining said front (42, 42', 42") and rear (43, 43', 43") faces, and a horizontal top face (45, 45', 45") and a horizontal bottom face (46, 46', 46") connecting said front (42, 42', 42"), rear (43, 43', 43") and side (44, 44', 44") faces together, and - two grooves (41, 41', 41") having a shape complementary to at least part of one of the associated second rods (32, 32', 32") and third rods (33, 33', 33") of said two pieces (3, 3', 3") and being arranged on said body (40, 40', 40"). - an overall parallelepipedal body (40, 40', 40") comprising a vertical front face (42, 42', 42"), a vertical rear face (43, 43', 43"), two vertical side faces (44, 44', 44") joining said front (42, 42', 42") and rear (43, 43', 43") faces, and a horizontal top face (45, 45', 45") and a horizontal bottom face (46, 46', 46") connecting said front (42, 42', 42"), rear (43, 43', 43") and side (44, 44', 44") faces together, and - two grooves (41, 41', 41") having a shape complementary to at least part of one of the associated second rods (32, 32', 32") and third rods (33, 33', 33") of said two pieces (3, 3', 3") and being arranged on said body (40, 40', 40").