Purpose: The term “somatization” describes a tendency to express psychological distress in the form of physical symptoms such as fatigue, headache, stomach, etc. Such somatization symptoms may relate to chronic stress-related illness as the external expression of psychological distress. The aims of this study was to examine the relationship among somatization symptoms and stress related factors including stress experience, perception, and coping methods for Korean middle-aged women. Methods: The sample consisted of 232 Korean women aged between 35 and 55 years living in Korea who do not have an experience of the hospital visits in terms of specific disease in the last 2 months. The 69-item Somatic Discomfort Inventory was administered to indicate subjective complaint respondents have experienced in the last 1 year. Stress-related factors were measured by items assessing stress experience, perception (including perceived stress level, openness, and control), and coping methods. Results: Logistic Regression Analyses including Ordered Probability, Logit, and Probit Model were used to investigate the influences of stress-related factors on somatization symptoms. When somatization symptoms was considered as the ordinal level for Ordered Probability Model, the chi-square of the final model, including all predictors (stress experience, perceived stress level, openness, control, and coping methods), was significant (X2 = 75.697, p = .000) and log likelihood was - 319.614. Of such independent variables, perceived stress level (b= .737, or = 2.090, p = .000), openness (b= -.212, or = .809, p = .005), and stress coping methods (b = .313, or = 1.368, p = .022) were significantly associated with somatization symptoms. Meanwhile, when somatization symptoms was converted into the binary level to compare the results of Ordered Probability Model with those of Logit and Probit Model, chi-square of somatization symptoms was all still significant (X2 = 45.997, p = .000, log likelihood = - 116.449 for Logit Model; X2 = 47.182, p = .000, log likelihood = - 115.857 for Probit Model). However, only perceived stress level sustained the significant association with somatization symptoms in both Logit (.207 perceived stress level, p = .001) and Probit Model (.213 perceived stress level, p = .000). Implications for Practice: Findings show that stress-related factors, particularly perceived stress level, significantly relate to somatization symptoms for Korean middle-aged women. This implies that how to perceive the stress may influence the degree to express psychological distress in the form of physical symptoms. Thus, it would be important for social workers to develop diverse stress management programs and social recognition skills to change the perceptive stress level and to ultimately reduce somatization symptoms.