The invention relates to a fan blade assembly of a turbojet with fan and a fan blade damper, the fan blade comprising a root and a platform, the fan blade damper being suitable for being attached in a housing formed in the lower face of the platform, said housing comprising an upstream side perpendicular to the root of the blade. The damper comprises a front edge of which a first portion is parallel to the upstream side of the housing and of which a second portion is inclined relative to said upstream side. The invention also relates to a fan blade damper and a method for calibrating said damper.