To understand why students in the 2nd cycle of medical studies choose to complete a Diploma of Specialized Studies (DSS) in geriatrics, we conducted a study to identify the factors influencing the choice of a future specialty. In addition, we assessed the impact of clinical in-hospital training (CIHT) in a geriatric hospital on the students’ selection of their future specialty. We included all students who completed CIHT in the geriatric facility of our University Hospital between 1 May and 31 October 2018. Data were collected using a two-part questionnaire: one part was given before CIHT and the other after. The students were classified into two groups: those considering a career in geriatrics (CIG) before CIHT, forming the group DSS geriatrics+ (GDSSG+), and those not considering it, constituting the group DSS geriatrics− (GDSSG−). Seventy-four students aged 22 years old were included. Of these students, 26% were considering a CIG before CIHT. This rate increased significantly to 42% after CIHT (p = 0.04). However, none of the students who indicated that they were potentially interested in pursuing geriatrics before CIHT preselected geriatrics as their first option. For more than 92% of the students, the comprehensive care of geriatric patients was an asset. The main drawbacks were diagnostic and therapeutic limitations (60% of students), then managing aging, disability, and neurocognitive disorders (55% of students). After CIHT, the view of geriatrics improved by 74%. In conclusion, geriatric CIHT improves students’ opinions of geriatrics and increases the number of students considering a CIG. However, geriatrics still suffers from a lack of prestige.