The utility model belongs to the technical field of sleep monitoring's technique and specifically relates to indicate a pectoral girdle of monitoring sleep state. It is including wearable pectoral girdle body and be used for adjusting the regulation suspender that the position was worn to the pectoral girdle, adjust the suspender including first connecting band and second connecting band, one is listed as the formula and is provided with a plurality of and detains the position on the first connecting band, be provided with on the second connecting band to be used for detaining with a knot complex and collude, be provided with the pectoral girdle box that is used for monitoring user's sleep state on the pectoral girdle body, the position detecting element who is provided with the singlechipin the pectoral girdle box, is used for to detect the electrocardio detecting element of user's rhythm of the heart and be used for detecting user's position, electrocardio detecting element, position detecting element respectively with singlechip electric connection, still be provided with the bluetooth the control unit who is used for accepting and sending the bluetooth communication signal inthe singlechip, bluetooth the control unit respectively with electrocardio detecting element, position detecting element electric connection.