Ernst Heinrich Philipp August Haeckel (1834 nî 2 goe̍h 16 ji̍t - 1919 nî 8 goe̍h 9 ji̍t) sī Tek-kok ê tōng-bu̍t-ha̍k-ka kap thiat-ha̍k-ka. I hoat-hiàn, biâu-su̍t koh hō-miâ liáu kúi-ā chheng ê chéng; pēng-chhiáⁿ thàm-thó kok-chióng seng-bu̍t ê chhin-goân koan-hē. Haeckel mā tī Tek-kok thôan-pò͘ Charles Darwin ê tì-chok.

Ernst Haeckel