Disclosed is an antenna module wherein isolation characteristics between an output signal and an input signal from an antenna are improved. An antenna module (100) is provided with: a dielectric substrate (102) including a first surface (116) and a second surface (118); an antenna (110) that is formed on the first surface; a high-frequency element (120) that supplies the antenna with a high frequency signal; and a signal terminal (142) that is formed in a columnar shape using a conductive material. The signal terminal is connected to the high frequency element via a wiring pattern that is provided on the dielectric substrate. The signal terminal is disposed outside of the range of an excitation region generated in the excitation direction of the output signal.