The question of the middle turbinectomy at the time of intranasal ethmoidectomy is an old issue which was argued many years ago. Todays enthusiastic supporters of the intranasal approach nearly all advocate preservation of the middle turbinate. Recent papers question the value of the middle turbinate as an only landmark available intranasally and some describe the removal of the middle turbinate if it is involved with diseases. Author probed the value of partial resection of the posterior half of the middle turbinate for the better visualization of the surgical field and for the more available anatomical landmarks intranasally by the experimental ethmoid dissection on the cadaver specimen. Author concluded that 1) the partial resection of the posterior inferior half of the middle turbinate makes the superior meatus, superior turbinate and sphenoethmoidal recess visible on the field and then they are served as reference structures for the further dissection. 2) the third basal lamella is more easily identified for it is the lateral extension of the floor of the superior meatus which becomes available on the field by the partial resection of the posterior inferior half of the middle turbinate. 3) it widen the surgical field for the anterior and posterior ethmoidectomy. 4) preserved anterior superior half of the middle turbinate and superior turbinate which becomes visible on the field are served useful landmarks for the cribriform plate.