海德堡要理问答（Heidelberg Catechism）是三项联合信条中的一项，是新教的教义文档，其中有一连串的问题及答案，在教授加尔文主义基督教教义时使用。海德堡要理问答是1563年在海德堡（位在现今的德国），原来的名称可翻译为「按照教会的用法及普法尔茨的学校的要理问答或基督教指南」。此要理问答是由普法尔茨选帝侯的委托下才产生，被翻译为多种语言版本，是改革宗最有影响力的教义问答之一。

The Heidelberg Catechism (1563), one of the Three Forms of Unity, is a Protestant confessional document taking the form of a series of questions and answers, for use in teaching Reformed Christian doctrine. It was written in 1563 in Heidelberg, present-day Germany. Its original title translates to Catechism, or Christian Instruction, according to the Usages of the Churches and Schools of the Electoral Palatinate. Commissioned by the prince-elector of the Electoral Palatinate, it is sometimes referred to as the "Palatinate Catechism." It has been translated into many languages and is regarded as one of the most influential of the Reformed catechisms.