Nicolaes de Giselaer, also Nicolaes de Geijselers, Nicolaes de Geyselers, Nicolaas de Gijselaer, Nicolaas de Gijzelaer, Nicolaes de Gyselaer, Nicolaas de Gyzelaer, Nicolaes de Ghyselaer (1583–1647) was a Dutch painter and draughtsman.