Purpose <p>This study examined pathways from sexual, physical, and emotional abuse in childhood to men’s sexual aggression in intimate relationships in adolescence and early adulthood, both as victims and perpetrators.</p> Methods <p>The online study employed a three-wave longitudinal design with twelve-month intervals (T1-T3) including 1,010 male university students in Germany (mean age of 21.4 years at T1). At T1, participants completed measures of sexual, physical, and emotional abuse in childhood (before the age of 14 years). Reports of sexual aggression in intimate relationships as victims and perpetrators were collected since the age of consent (14 years; T1) or in the last 12 months (T2 and T3, respectively) using the Sexual Aggression and Victimization Scale (SAV-S). Path analysis was used to examine direct and indirect associations between childhood abuse and sexual aggression.</p> Results <p>Childhood sexual, physical, and emotional abuse predicted sexual victimization by an intimate partner directly at T1 and indirectly at T2 via T1 victimization and at T3 via victimization at T1 and T2. Sexual and physical abuse predicted sexual aggression perpetration against an intimate partner at T1 and indirectly at T2 via perpetration at T1 and at T3 via perpetration at T1 and T2. Emotional abuse was unrelated to sexual aggression perpetration.</p> Conclusions <p>As predicted, men’s experiences of childhood abuse were associated with an elevated vulnerability to sexual victimization by an intimate partner and a higher risk of engaging in sexual aggression perpetration against an intimate partner. The implications of the findings for prevention efforts are discussed.</p>