The goal of this study was to investigate the role of mortality salience manipulation on the ageist attitudes and to ascertain if a participants' age-related moderation effect exists on that relationship. Previous research shows that in the event of mortality salience participants show greater ageist tendencies. Research on the topic of participants' age and their ageist expressions are few, and those are inconclusive. Some of them show no effect of age on ageism; some show that ageism is greatest among the young adult population; some show evidence for greater inter-group ageism, within the elderly population; some show the greatest ageism among the middle-aged. To assert the moderation effect of participants' age on the mortality salience induced ageism relationship there were no prior researches conducted. The study was conducted via an online questionnaire and the sample was made of 293 participants, aged 19 to 75. By chance, participants were divided into two groups, of which one had to read mortality salience manipulation text, while the other half had to read the control text. Afterward, participants had to fill out the Ambivalent ageism scale. Results show confirmation of mortality salience effect on greater ageist tendencies. Within the age groups, we found no significant difference in the expression of ageism. There was no statistically significant moderation effect of age on the relation of mortality salience and ageism.