Spinal canal stenosis is a common pathologic condition in old age. Generally, spinal disorders which contain both stenosis and spondylolisthesis bring many kinds of social problems and require a large amount of financial costs (Atlas SJ et al., Spine 21(15):1787–1794, 1996; Biswas KC et al., Proc Inst MechEng Part H J Eng Med 233:1292–1298, 2019; Cornefjord M, Eur Spine J 9(6):563–570, 2000). Most patients who have spinal disorder receive a conservative treatment initially. However, patients who have not improved after long-term conservative treatment have to consider surgical treatment eventually. Spinal canal stenosis may occur alone or be accompanied by degenerative spondylolisthesis. In case of patients with degenerative spondylolisthesis above grade 2, proper treatment is not easy because of severe vertebral body slippage (Pan A et al., Eur Spine J 25:1522–1532, 2016; Schaeren S et al., Spine 33:E636–42, 2008; Shim CS et al., Spine Arthroplasty Soc J 1(3):118–124, 2007). For many patients who suffer from neurologic intermittent claudication and leg pain, various treatment methods are introduced from percutaneous procedures to deformity surgeries which require reconstruction of vertebral bodies and decompression of spinal canal using a microscope (Biswas JK, Proc Inst MechEng Part H J Eng Med. 2019;233:1292–1298; Christie SD, Spine, 30(16 Suppl): S73–S78, 2005; Rhee J et al. J Neurosurg Spine 17(5):453–458, 2012). The author introduces the method of obtaining successful clinical results using bilateral partial hemi-laminectomy using a microscope and endoscope among several methods.