A liquid ejection head including: a head body having a nozzle surface; a fixing plate including a bottom surface to be fixed to the head body and a side surface intersecting the bottom surface; and first filler filled between the head body and the side surface, wherein the side surface is in contact with a biasing plate biased from the side surface toward the head body, and the first filler is filled at least to a height of contact position between the fixed plate and the biasing plate with respect to the bottom surface.