It is installed on a bed, etc., and relates to a sensor for measuring sleep-free state of sleep, which detects a signal indicating information on the sleep pattern, such as sleep start and end points, sleep time, and the number of times during sleep. The sensor structure includes a plurality of branches installed at a predetermined interval between the pair of first period wiring patterns and the first period wiring pattern arranged in parallel in the longitudinal direction with a strip-shaped first base film made of an insulating material. A bipolar wiring pattern body including a wiring pattern and a plurality of pattern parts formed at intervals on a strip-shaped second base film made of an insulating material, wherein each of the pattern parts includes a width direction of the second base film. And a pair of second period wiring patterns arranged in parallel to each other and switch wiring patterns arranged in parallel at intervals between each of the period wiring patterns, and overlapping with a connection wiring pattern joined to the bipolar wiring pattern. And a spacer for maintaining a suitable gap therebetween, and the gap is provided on the bottom of the second base film. The pattern portions have high strength support plate for each region is configured eojin pad. The first base film under the load of the human body is relatively flexible and works smoothly according to the movement of the human body, and the second base film on the floor is stably supported by the high-strength support plate, thereby providing a soft bed and other accessories. It is considered to be used without malfunction even when installed underneath.침대요 등에 설치하여 수면 개시와 종료 싯점, 수면시간, 수면 중 뒤척임 횟수 등 수면 패턴에 관한 정보를 나타내는 신호를 검출하는 무구속 수면상태 측정용 센서에 관한다. 그 센서 구조체는 절연 재질로 이루어진 띠 형상의 제1 베이스 필름에 길이 방향으로 간격을 두고 평행하게 배열된 1쌍의 제1 기간배선 패턴 및 상기 제1 기간배선 패턴 사이에 일정 간격으로 설치된 다수의 가지 배선 패턴을 포함하여 이루어진 2극배선 패턴체, 절연 재질로 이루어진 띠 형상의 제2 베이스 필름에 간격을 두고 형성되는 다수의 패턴부를 포함하여 이루어지되 각각의 상기 패턴부는 상기 제2 베이스 필름의 폭 방향으로 평행하
