Do the Turkish parliamentary committees exhibit gendered appointment practices? If so, what are the driving factors behind women's limited representation in some committees? Previous studies find a division of labor in committees based on the perceived gender roles: women legislators are over-represented in low-prestige committees with “feminine” themes such as family, health, and education, whereas they are under-represented in strategically key policymaking committees. These studies —mostly on Western democracies— explain this gender bias with the appointment practices of the conservative right-wing parties. Using an original dataset of appointments between 2002 and 2020, this paper examines the partisan effects on the under- and over-representation of women on certain committees in the Turkish context. We find that all parties except the small left-wing Peoples' Democratic Party (PDP) perform in a similarly biased way. We argue that parliamentary committees are gendered institutional spaces greatly affected by the institutional culture of political parties. Even though institutional culture is mostly shaped by ideological stances, political parties are still among institutional spaces where ideologies of masculinity are effectively shaping power relations. We conclude that institutionalizing mechanisms that enhance agential capacities and practices at the party level are vital for gender equality within the political sphere.