The absorption spectrum of Eu I between 40 and 300 angstrom has been recorded. Prominent structure due to the excitation of the 4d subshell has been found. The spectrum closely resembles that reported for Eu metal (Zimkina, Fomichev, Gribovskii & Zhukova 1967), although many additional resonances are resolved in the present work. It is dominated by a 'giant resonance', attributed to 4d $\rightarrow $ (4f, $\epsilon $f) transitions, and occurring above the main threshold for 4d ionization. Identifications of the main features are proposed and are supported by Hartree-Fock calculations. Evidence of a 4d $\rightarrow $ $n$p series has also been found.