Disclosed are: a sensor assembly which comprises a flexible sensor element using a polymer material and has excellent durability since the constituent members such as the sensor element are not easily deteriorated; and a sensor module. Specifically disclosed is a sensor assembly (3) which is provided with: a sensor element (30) that comprises a sensor thin film (32) that is formed of a resin or an elastomer and at least a pair of electrodes (33R, 33L) that are connected to the sensor thin film (32); and a packaging bag (40) for enclosing the sensor element (30). The packaging bag (40) is composed of laminated films (41, 42) each comprising a metal foil (411) and two resin layers (410, 412) that are arranged with the metal foil (411) interposed therebetween.
