Introduction: Perinatal depression and anxiety are prevalent, but professional mental health help-seeking remains low, resulting in a lack of utilization of mental health services. We aimed to determine the prevalence of positive mental health help-seeking behaviour (MHHSB) among pregnant women and its associated factors. Materials and methods: This cross-sectional study was conducted at an urban public maternal and child health clinic (MCHC) in Selangor, Klang Valley between August and November 2022. 296 pregnant women were recruited. The Malay version of Edinburgh Postnatal Depression Scale (EPDS), Self-Stigma of Seeking Psychological Help (SSOSH), Mental Health Literacy Scale (MHLS) and MHHSB questionnaires were used for data collection. Multivariate logistic regression was used to identify factors. Results: The mean age was 30.06 (±5.14) years and more than two-third (61%, n=181) were multiparous. More than half (57.4%, n=170) were in their second trimester, while 15.9% (n=47) and 21.3% (n=63) had probable depression and anxiety, respectively. The prevalence of positive MHHSB was 73.6% (95% CI: 0.68, 0.78), yet the prevalence of probable getting professional assistance was 22.6% (95% CI: 0.18, 0.28). Two factors were associated with positive MHHSB. These were probable anxiety [odds ratio (OR)3.86, 95% CI: 1.80, 9.15] and MHLS [OR 1.05, 95% CI: 1.03, 1.08]. Conclusion: Positive MHHSB was prevalent among pregnant women, yet the possibility of seeking professional assistance is low. Having anxiety was likely to influence MHHSB, hence efforts to improve mental health literacy and training staff to recognize symptoms and cultivating supportive environment for pregnant women will ensure timely interventions.