This chapter discusses and analyses the concept of heteronormativity and how it connects to masculinity and the studies of masculinities. In terms of masculinity, heteronormativity often tends to imply certain masculine ideals in general and specific forms of masculine power in particular. The concept thus often implies how a specific hegemonic heterosexual masculinity is being positioned against, and even established through, the Othering of gay men or, sometimes, men striving for gender equality. The chapter examines how heteronormativity is still in many ways a valid concept and analyses and critically examines the use of this concept of heteronormativity. When talking about heteronormativity and masculinity, it is impossible not to talk about femininity and women as well as masculinity and men, since these concepts are somewhat interrelated. The chapter focuses on different ways in which heteronormativity affects masculinity through promotion, violence, and the media, as well as globally and in terms of sexuality and intimacy.