Errata to the paper T. Koornwinder, A new proof of a Paley-Wiener type theorem for the Jacobi transform, Ark. Mat. 13 (1975), 145-159. Last mocdified: 25 July 2024. In (2.7) replace $\phi_{2\lambda}^{-1/2,-1/2}(t)$ by $\phi_\lambda^{-1/2,-1/2}(t)$.