The first chapel to the left of the
choir was dedicated in 1679 to the Virgin Mary and Saint Joseph. The patrons were the manoir de Kerloaguen. In the second chapel, dedicated in 1679 to Sainte-Marguerite and Saint-Gildas, is the altar of Saint-Vincent de Paul the work of
Yann Larhantec and in the keystone of the arcade corresponding to this chapel is a shield bearing the coat of arms of the Goudelins, "seigneurs" of Kerloaguen. The third chapel is dedicated to Saint-Yves and the corresponding arcade keystone holds the
blason of Salaün de Lesven. The fourth chapel and the last in the left wing of the church was dedicated in 1679 to "Notre-Dame de Pitié". The arcade keystone here has the coat of arms of Le Lagadec. In recesses in the church walls many of the Plougonven nobility are buried. In the right side
aisle is a chapel dedicated to Saint-Roch, Saint-Laurent and Saint-David and the coat of arms of the Keraudrens can be seen in the neighbouring arcade. There is also a chapel of the rosary. The other chapel was dedicated in 1679 to John the Baptist now dedicated to Sainte-Anne. This chapel holds the shield of the Goudelins. ==The tomb of Abbé Le Teurnier==