Garment for measuring biological information, a biological information measurement system, a biological information measurement device and method of controlling thereof capable of measuring biological information with accuracy regardless of variations of the constitution of each examinee yet a simple structure. A resistance value sensor (21) senses variation of electric resistances of a chest respiratory information sensor (502) and a chest respiratory information sensor (504) on a shirt (500) of a biological information measuring shirt. A CPU (10) of an analysis device (100) calculates variation cycles of resistance in accordance with the resistance data and outputs respiration values based on the calculation results.