Abstract: Disclosed is a sensor assembly for self-diagnosis of breast cancer, the sensor assembly includes a poly-di-methyl-siloxane (PDMS) module sensing elasticity distribution of breast tissue and emitting near-infrared rays to allow a mobile analyzing device to obtain and process tactile images and near-infrared images for self-diagnosis of breast cancer, and a mounting module to which the PDMS module is detachably mounted in a screw-coupling manner in which the mounting module wirelessly supplies an operating power to the PDMS module through contact between electrodes.