Pulse wave detection device and biological condition analysis device

A biosignal can be more precisely detected. A pulse wave detection device (610) comprises: a first filtering means (611) for filtering, with a predetermined frequency, the output signal of a sensor for detecting the air pressure fluctuation of an air cushion and extracting the carrier wave of a pulse wave; a wave detector (612) for detecting the signal wave filtered by the first filtering means (611); and a second filtering means (613) for filtering the signal wave detected by the wave detector (612) between from a respiratory component frequency to a second harmonics frequency.  This makes it possible to capture a notch in the obtained signal wave, so that the analysis result of a biological condition, such as the detection of a hypnagogic omen signal or the like, becomes more accurate.