The purpose of this study is to examine the relation between attachment and depression as mediated by marital adjustment in Czech adults. Participants in Sample 1 was 339 pregnant women (mean age=29.63, SD=4.51). Participants in Sample 2 was 896 adults (mean age=25.72, SD=6.88). All of them are in a relationship. Participants completed online questionnaires to measuring romantic attachment (ECR-RS), marital adjustment (RDAS) and depression (PHQ-9). The same mediational model was tested separately in each sample. The fit of both models is satisfactory (S1: χ2(67)=150.95, p<.001, RMSEA=0.061, CFI=0.963, SRMR=0.044; S2: χ2(67)=297.64, p<.001, RMSEA=0.062, CFI=0.959, SRMR=0.042). In both models, higher attachment-related avoidance directly leads to lower depression, while it indirectly leads to more depression through the decrease in marital adjustment. The total effect of attachment-related avoidance on depression was almost none. Attachment-related anxiety directly leads to higher depression. Indirect effect is small.