A non-contact measurement method for estimating blood pressure using video pulse waves has been developed. During fluctuation in blood pressure caused by respiratory arrest, the video pulse waves were measured by using a video camera to calculate the pulse transit time difference (PTTD) from a proximal part to a distal part with respect to the heart. Blood pressure was estimated by a multivariate regression model with the PTTD, heart rate and the pulse amplitude (PA) as explanatory variables. It was suggested that the variation among individuals could be suppressed by using correlation between the model parameters and the changes in the PA.