摘要： 围绕“为什么处罚要处罚未遂行为”问题的讨论，在德国刑法学界已经有了两百年以上的历史。实际上，这个问题与刑罚目的理论、不法理论的基本问题有着紧密的关联，在这样的关联中清晰地展现未遂理论过去和现在的历史变化，有助于了解未遂理论发展的历史脉络和当今的研讨状况，由此，推测其未来发展的可能方向和空间。

关键词: 未遂理论的历史 , 客观未遂理论 , 主观未遂理论 , 不能未遂

Abstract: The question that why punish the crime of attempt have discussed in Germanny more than two hundred years and have long occupied the imaginations of scholars of criminal laws．Actually，the issues involved are here the fundamental issues of theories of purpose of punishment and Unlawfulness．In order to understand the theoretical history of the issues and the Stand of today’dicussion in Germanny as well as the focus shall be shifted toward and the posibility of development in the future，it is necessary to introduce and outline the history of theoretical challenges and developments of punishing the crime of attempt．

Key words: History of Theory of Attempt, Objective Theory of Attempt, Subjective Theory of Attempt, Attempt of Imposibility