Terror management theory (Greenberg, Pyszczynski, & Solomon, 1986) posits that individuals defend against death-anxieties by striving for (symbolic) immortality.Immortality is promised by a symbolic anxiety buffer, which entails one's (a) cultural worldview; (b) self-esteem; and (c) intimate relationships. Under conditions of mortality salience (MS), individuals prefer potential partners who validate their symbolic anxiety buffer (or are similar to them) over those who challenge it (or are different). Potential partners can be different on the intergroup level (i.e., out-group members) and on the interpersonal level (i.e., having different attitudes). Greenberg et al. (1986) suggested intergroup differences to pose a larger threat than interpersonal differences. So far, the relative threat resulting from differences on both levels has not been tested directly.In the current study, N = 195 women were randomly assigned to an MS (versus control) condition and shown a potential online date following a 2(group-membership) × 2(interpersonal similarity) design. Individuals' (a) need for worldview validation; (b) state self-esteem; and (c) dating interest was measured. The results showed threats to the symbolic anxiety buffer due to intergroup but not due to interpersonal differences. Findings were obtained for validation needs and self-esteem but not for dating interest. Implications are discussed.