The T1 relaxation time is a fundamental quantitative Magnetic Resonance parameter widely used to characterize healthy and pathological tissue. However, quantitative T1 mapping in the human spinal cord (SC) has been limited to date, mainly due to its small size and sensitivity to artefacts. Here we assess the reproducibility of a time efficient (<5min) SC protocol for Inversion Recovery T1 mapping, which is considered the gold-standard method for T1 estimation. Scan-rescan experiments were performed in a cohort of 4 healthy subjects. High reproducibility (whole cord intraclass correlation=0.94) of T1 estimates was found, with whole cord intra-subject coefficient-of-variation<15% for all subjects.