A content generation device includes: an acquisition unit that acquires text data representing a first text, being a reading target; a voice generation unit that, using a voice generation model that based on a voice in which a user has read out a second text, being a learning target, has learned a way of reading out the second text in a voice of the user, generates a synthesized voice in which the first text represented by the acquired text data is read out in the voice of the user; and a synthesis unit that generates synthesized content by synthesizing the generated synthesized voice and a personal image of the user.