《心》（日语：こゝろ），是夏目漱石的长篇小说代表作。

在1914年（大正3年）的4月20日至8月11日之间，以「心 先生の遗书」为题，于朝日新闻上连载。并在同年，由夏目漱石向岩波书店自费出版，成为岩波书店最初的出版物。

《心》一书分为三个章节，分别是上篇〈老师与我〉；中篇〈双亲与我〉；下篇〈老师与遗书〉。上篇内容主要描述「我」与老师认识之后，「我」渐渐深入接触了老师的思想，家庭和厌世的人生观。并且从与师母的谈话之中，「我」得知了其实老师一开始并非如此厌世，而老师的一切转变，都与老师的某位葬在杂司谷的朋友有关。

Kokoro(こゝろ, or in post-war orthography こころ) is a novel by the Japanese author Natsume Sōseki. It was first published in 1914 in serial form in the Japanese newspaper Asahi Shinbun. While the title literally means "heart", the word contains shades of meaning, and can be translated as "the heart of things" or "feeling". The work deals with the transition from the Japanese Meiji society to the modern era, by exploring the friendship between a young man and an older man he calls "Sensei" (or teacher). It continues the theme of isolation developed in Sōseki's immediately preceding works, here in the context of interwoven strands of egoism and guilt, as opposed to shame. Other important themes in the novel include the changing times (particularly the modernization of Japan in the Meiji era), the changing roles and ideals of women, and intergenerational change in values, the role of family, the importance of the self versus the group, the cost of weakness, and identity.