A speaker system comprising: an acoustic lens (40L 40R) that adjusts directivity of a sound emitted from a speaker, the acoustic lens (40L 40R) comprising: a plurality of fins (44a to 44d) arranged at a predetermined interval, characterized in that, the acoustic lens (40L 40R) further comprises:- a first fin (44b 44c) that is one of the plurality of fins (44a to 44d) at least includes: a first notch portion provided on a front side of a path of the sound; and a second notch portion (46b 46c) provided on a rear side of the path of the sound and having a shape matching a shape of a diaphragm of the speaker, such that the shape of the second notch portion (46b 46c) comprises a recess in a direction where a curved surface of the diaphragm protrudes towards the first fin (44b 44c) or an inclination, matching an inclination direction of the diaphragm, the diaphragm being disposed in proximity to the first fin (44b 44c) and further disposed to fit in the second notch portion (46b 46c); and the speaker that outputs the sound, wherein the acoustic lens (40L 40R) is disposed on the path of the sound emitted from the speaker, wherein the plurality of fins (44a to 44d) are each arranged parallel to each other and the plurality is arranged to extend in a direction perpendicular to a longitudinal direction of the plurality of fins (44a to 44d), and respective shapes of the plurality of fins (44a to 44d) are asymmetrical in the longitudinal direction, said longitudinal direction of the plurality of fins comprising a direction perpendicular to the path of sound and in a longitudinal direction of the speaker system. a plurality of fins (44a to 44d) arranged at a predetermined interval, characterized in that, the acoustic lens (40L 40R) further comprises:- a first fin (44b 44c) that is one of the plurality of fins (44a to 44d) at least includes: a first notch portion provided on a front side of a path of the sound; and a second notch portion (46b 46c) provided on a rear side of the path of the sound and having a shape matching a shape of a diaphragm of the speaker, such that the shape of the second notch portion (46b 46c) comprises a recess in a direction where a curved surface of the diaphragm protrudes towards the first fin (44b 44c) or an inclination, matching an inclination direction of the diaphragm, the diaphragm being disposed in proximity to the first fin (44b 44c) and further disposed to fit in the second notch portion (46b 46c); and the speaker that outputs the sound, wherein the acoustic lens (40L 40R) is disposed on the path of the sound emitted from the speaker, wherein the plurality of fins (44a to 44d) are each arranged parallel to each other and the plurality is arranged to extend in a direction perpendicular to a longitudinal direction of the plurality of fins (44a to 44d), and respective shapes of the plurality of fins (44a to 44d) are asymmetrical in the longitudinal direction, said longitudinal direction of the plurality of fins comprising a direction perpendicular to the path of sound and in a longitudinal direction of the speaker system. a first notch portion provided on a front side of a path of the sound; and a second notch portion (46b 46c) provided on a rear side of the path of the sound and having a shape matching a shape of a diaphragm of the speaker, such that the shape of the second notch portion (46b 46c) comprises a recess in a direction where a curved surface of the diaphragm protrudes towards the first fin (44b 44c) or an inclination, matching an inclination direction of the diaphragm, the diaphragm being disposed in proximity to the first fin (44b 44c) and further disposed to fit in the second notch portion (46b 46c); and the speaker that outputs the sound, wherein the acoustic lens (40L 40R) is disposed on the path of the sound emitted from the speaker, wherein the plurality of fins (44a to 44d) are each arranged parallel to each other and the plurality is arranged to extend in a direction perpendicular to a longitudinal direction of the plurality of fins (44a to 44d), and respective shapes of the plurality of fins (44a to 44d) are asymmetrical in the longitudinal direction, said longitudinal direction of the plurality of fins comprising a direction perpendicular to the path of sound and in a longitudinal direction of the speaker system.