An antenna module includes a first ground structure, a first radiation portion and a second radiation portion. The first ground structure includes a first ground portion, a second ground portion and ranged between the first ground portion and the second ground portion. The first radiation portion is configured to generate a first resonant mode accompanied with the first ground structure, including a first feeding terminal configured to send and receive a first antenna signal, and a first grounding terminal coupled to the first ground portion. The second radiation portion is configured to generate a second resonant mode in a manner of coupling with the first radiation portion, including a second feeding terminal configured to send and receive a second antenna signal, and a second grounding terminal coupled to the second ground portion.