An ultrasonic sensing device includes a signal transmission layer, a signal reception layer and a flexible printed circuit board. The signal transmission layer is configured to transmit ultrasonic waves, and the signal reception layer is configured to receive the ultrasonic waves reflected from a to-be-sensed object and forming a sensing signal corresponding to the to-be-sensed object. The flexible printed circuit board includes a first surface and a second surface opposite to the first surface. The signal reception layer is formed on the first surface. The signal transmission layer is formed on the second surface. The flexible printed circuit board also includes a plurality of sensing components and at least one connector, both of the sensing components and the connector are set on the first surface. The plurality of sensing components are used for transmitting the sensing signals formed by the signal reception layer to a readout device via the a least one connector, and the readout device further transforms the sensing signals of the sensing object into image information or data information. An ultrasonic patch with the ultrasonic sensing device is also provided.一種超音波傳感器，包括用於發射超音波的訊號發送層、用於接收一被測物反射的超音波，並形成對應該被測物的感測訊號的訊號接收層以及柔性電路板。該柔性電路板有相對的第一表面及第二表面。所述訊號接收層設置於所述第一表面。所述訊號發送層設置於所述第二表面。所述柔性電路板還包括均位於所述第一表面的多個感測元件及至少一連接器，所述多個感測元件用於將所述訊號接收層形成的感測訊號經由所述至少一連接器傳輸至一讀取裝置，以進一步轉化為對應所述被測物圖像資訊或資料資訊。本發明還提供一種使用該超音波傳感器的貼布。
