The transmucosal dental implant (100) comprises a support (110) adapted to be partially inserted into a mandible or maxilla bone (25) and typically, a stump (50) fixed to said support (110) and adapted to receive a dental prosthesis (65); said support (110) has an elongated shape and comprises, in a first end area thereof, a first part (10) adapted to be fixed into said bone (25); in a second end area thereof, said support (110) comprises a second part (20) shaped as a truncated cone, in contact with said stump (50), and the cross-section of which decreases in the direction of said stump (50); said first part (10) is adapted to be inserted into said bone (25) and said second part (20) is adapted to be at least partially placed in an oral mucosa (15); said second part (20) is inclined by a second angle (A1 ) from 8° to 15°.