A fixation screw with micro holes comprises a micro hole layer with a plurality of micro holes composed of multiple micro beams. When the fixation screw is locked into the bone body, the newly born bone tissues may be engaged with the plurality of micro holes, so the fixation screw and the bone body may be tightly bonded as a whole.一種具微孔之固定螺釘,是含有由多數微樑所構成複數微孔之微孔層,使該固定螺釘鎖入骨體中時,新生之骨組織可以嵌入複數微孔中,達到固定螺釘與骨體牢固地結合成一體之目的。(10)‧‧‧固定螺釘(11)‧‧‧螺釘頭(111)‧‧‧銜接穴(112)‧‧‧壓制件(112a)‧‧‧壓制板(112b)‧‧‧扣板(12)‧‧‧螺桿段(120)‧‧‧芯軸部(121)‧‧‧桿體部(122)‧‧‧螺牙部(123)‧‧‧微孔層