Problem to be solved: to provide an optical connector capable of improving the insertion efficiency of the optical connector to the connection portion of the connection point, and an optical acoustic wave generating apparatus using the optical connector.An optical fiber (10) having a ferrule portion (11) at one end and aA cylindrical tubular connection member (12) into which an optical fiber (10) is inserted;A ferrule section (11) is installed in one end cylinder.The other end is provided with a cylindrical connection member (12) to which the other end of the optical fiber is pulled out.Ferrule section (11)The cylindrical connection member (12) has a convex portion (11c) having a convex direction in a direction perpendicular to the length direction of the cylindrical connection memberAn O-ring (15) is provided in contact with the outer surface in the longitudinal direction of the cylindrical connection member (12) of the projection (11c).光コネクタの接続先の接続部への挿入性を向上することができる光コネクタおよびその光コネクタを用いた光音響波発生装置を提供する。一端にフェルール部(11)が設けられた光ファイバ(10)と、光ファイバ(10)が挿入される筒状に形成された筒状接続部材(12)であって、一端部の筒内にフェルール部(11)が設置され、他端部から光ファイバの他端が引き出される筒状接続部材(12)とを備え、フェルール部(11)が、筒状接続部材(12)の長さ方向に直交する方向に凸方向を有する凸部(11c)を有し、凸部(11c)の筒状接続部材(12)の長さ方向外側の面にOリング(15)が接触して設けられている。