Martin Eden is a 1909 novel by American author Jack London about a young proletarian autodidact struggling to become a writer. It was first serialized in The Pacific Monthly magazine from September 1908 to September 1909 and then published in book form by Macmillan in September 1909.

Eden represents writers' frustration with publishers. The central theme of Eden's developing artistic sensibilities places the novel in the tradition of the Künstlerroman, which narrates an artist's formation and development.

Eden differs from London in rejecting socialism, attacking it as "slave morality" and relying on Nietzschean individualism. Nevertheless, in the copy of the novel which he inscribed for Upton Sinclair, London wrote, "One of my motifs, in this book, was an attack on individualism (in the person of the hero). I must have bungled it, for not a single reviewer has discovered it."

Living in Oakland at the beginning of the 20th century, Martin Eden struggles to rise above his destitute, proletarian circumstances through an intense and passionate pursuit of self-education, hoping to achieve a place among the literary elite. His principal motivation is his love for Ruth Morse. Because Eden is a rough, uneducated sailor from a working-class background and the Morses are a bourgeois family, a union between them would be impossible unless and until he reached their level of wealth and refinement.

Over a period of two years, Eden promises Ruth that success will come, but just before it does, Ruth loses her patience and rejects him in a letter, saying, "if only you had settled down ... and attempted to make something of yourself". By the time Eden attains the favor of the publishers and the bourgeoisie who had shunned him, he has already developed a grudge against them and become jaded by toil and unrequited love. Instead of enjoying his success, he retreats into a quiet indifference, interrupted only to rail mentally against the gentility of bourgeois society or to donate his new wealth to working-class friends and family. He feels that people do not value him for himself or for his work but only for his fame.

A former sailor from a working-class background, who falls in love with the young, bourgeois Ruth and educates himself to become a writer, aiming to win her hand in marriage.

The young, bourgeois university student who captivates Eden while tutoring him in English. Though initially both attracted and repelled by his working-class background, she eventually realizes she loves him. They become engaged, with the condition that they cannot marry until her parents approve of his financial and social status.

A cannery worker rejected by Eden, who is already in love with Ruth. Initially, while Eden strives for education and culture, Lizzie's rough hands make her seem inferior to Ruth in his eyes. Despite this, Lizzie remains devoted to him. He feels an attachment to her because she has always loved him for who he is, and not for fame or money, as Ruth does.