Objective: High morning blood pressure and an increase in the nocturnal blood pressure are well-documented risk factors for poor cardiovascular outcomes. A possible shared risk factor for the morning and nocturnal hypertension (HT) is sleep-disordered breathing (SDB). This study aimed to clarify the association of SDB with nocturnal and morning HT, as well as office HT, to better understand the pathophysiological significance of SDB in HT. Design and method: Study participants in this cross-sectional study were 5,866 general population (mean age: 57.9 years). Sleep characteristics including sleep duration and sleep efficiency were evaluated using a wrist activity monitor for one week. SDB was assessed using the 3% oxygen desaturation index corrected for actigraphy-determined sleep duration. A timer-equipped cuff-oscillometric device was used for home and sleep blood pressure monitoring. The BP monitor was programmed to automatically measure the BP at 0.00, 2.00, and 4.00 a.m. Sleep BP was determined using actigraphy and BP values measured within 1 h after waking up and within 1 h before sleeping were considered as morning and evening BPs, respectively. Results: Isolated nocturnal, isolated morning, and sustained nocturnal-to-morning HT occurred in 13.5%, 9.1%, and 25.9% of participants, respectively. Participants with HT generally were older, more frequently were men, and obese compared with normotensive individuals (all P < 0.001). Other clinical factors that were significantly different depending on the HT types were carotid hypertrophy, nocturnal voiding frequency, sleep efficiency, and SDB (all P < 0.001). Multinomial logistic regression analysis identified SDB as a significant determinant for sustained HT (coefficient = 0.026, P < 0.001) and morning HT (coefficient = 0.024, P < 0.001) but not isolated nocturnal HT (P = 0.907). SDB was also associated with office HT (Coefficient = 0.027, P < 0.001). In contrast, low sleep efficiency was associated with isolated nocturnal HT, while the frequency of nocturnal urination showed a positive association with isolated nocturnal HT and sustained HT. Conclusions: SDB had a stronger influence on morning than nocturnal BP, while low sleep efficiency and nocturnal urination had greater influences on sleep BP