Kees de Boer was born in Hoorn, The Netherlands. He studied at the Graphic Art school in Amsterdam for four years. He made his debut in some underground magazines, including Coyote, and with a regular cartoon in Noord-Hollands Dagblad. He had his breakthrough in 1987, upon joining Eppo/Wordt Vervolgd. For this magazine, he drew the series 'Max Laadvermogen', of which one album has been published. Together with writer Rolf Hartog van Banda, he created 'Sidi en Smook' in Donald Duck, the weekly for which he also illustrates the jokes section.
Hoofdpijn, reumatiek (Coyote #6, May 1984)
De Boer worked in the Funny Farm Studios with Gerard Leever. They cooperated on the scenarios of the series 'Felix Flux Museum' for Sjors en Sjimmie Stripblad, as well as 'Junior Reporter' for Junior, both with art by Gleever. De Boer has also done illustration work for Panorama and Mickey Maandblad. He did lots of work for Wolters Noordhoff, EPN and almost every children's magazine by Malmberg and Sanoma. His comic 'Gustaaf Raaf' is published in Taptoe. De Boer has made illustrations for many children's books since 1996. He has worked extensively with Tjibbe Veldkamp on several books, including the 'Agent en Boef' series. In 2014 he hosted the online interview series 'Stripmakers drinken wijn aan het water' in commission of the Dutch Association of Comic Authors.