Fixing means for fixing a wear element on the front edge of a support, where said wear element comprises two arms extending backwards opposite one another, leaving a gap therebetween to house said front edge, thereby defining an assembled position, where said arms have first through holes facing one another and said support has a second through hole which is sandwiched between said first through holes in said assembled position, where said fixing means comprise: [a] a C-shaped body, [b] a wedge, where said body and said wedge are housed in said holes (8, 12) in said assembled position, and [c] a screw having a head and a shank, with a first segment under said head having a smaller diameter than said head, a second segment after said first segment having a larger diameter than said first segment, and a threaded segment after said second segment, where said first segment has a length of a predetermined value in the axial direction, where there is a hollow space between said wedge and said body in said assembled position suitable for housing the shank of said screw, said hollow space defining a shank axis coinciding with the shaft of said shank, characterized in that they additionally comprise [d] a nut screwed onto said threaded segment, and in that: - said C-shaped body has a C-shaped projection extending into said hollow space suitable for housing said first segment of said screw, where the length of said projection in the axial direction is less or equal than said predetermined value, and where neither said head nor said second segment is suitable for moving through said projection in the axial direction, - said wedge has a first projection and a second projection extending into said hollow space, where said first projection has a through hole suitable for allowing the passage of said threaded segment and suitable for blocking the passage of said nut, and where said second projection has a through hole suitable for allowing the passage of said threaded segment and suitable for blocking the passage of said nut, where said nut is allocated between said first projection and said second projection in said assembled position, and where the distance between said first projection and said second projection in the axial direction is greater than the height of said nut in the axial direction. - said C-shaped body has a C-shaped projection extending into said hollow space suitable for housing said first segment of said screw, where the length of said projection in the axial direction is less or equal than said predetermined value, and where neither said head nor said second segment is suitable for moving through said projection in the axial direction, - said wedge has a first projection and a second projection extending into said hollow space, where said first projection has a through hole suitable for allowing the passage of said threaded segment and suitable for blocking the passage of said nut, and where said second projection has a through hole suitable for allowing the passage of said threaded segment and suitable for blocking the passage of said nut, where said nut is allocated between said first projection and said second projection in said assembled position, and where the distance between said first projection and said second projection in the axial direction is greater than the height of said nut in the axial direction.