Johannes Lambertus (Bertus) de Harder (14 January 1920 – 7 December 1982) was a Dutch footballer who played as a striker.

He scored 3 goals in 11 games for the Netherlands national team.

[1] He represented the Netherlands at the 1938 FIFA World Cup.

He played for FC Girondins de Bordeaux in France where he later became a manager with AS Angoulême and FC Mulhouse.

This biographical article related to association football in the Netherlands, about a forward, is a stub.