Hypertension is closely associated with cardiovascular events, so it is important to strictly control blood pressure (BP) throughout 24 hours. Home BP (HBP), which is also a better predictor of organ damage and cardiovascular disease, is treated with priority in JSH2014. We can detect white coat hypertension(WCH) and masked hypertension (MH) used by either HBP monitoring(HBPM) or ambulatory blood pressure monitoring (ABPM). Especially masked nocturnal hypertension, which is reported to be present of one fourth of well controlled morning hypertension, is associated with advanced organ damage. HBPM is available to detect masked nocturnal hypertension. Therefore, self-measured sleep BP at home would be spread in the future. It is important to properly recognize hypertensive's condition and treat that using various BP monitoring.