EI or Ei may refer to:
Ei is the third studio album by Finnish pop rock singer-songwriter Maija Vilkkumaa. Released by Warner Music in Finland on , the album debuted at number one on Finnish Albums Chart, maintaining the peak position for two weeks and charted for 56 weeks altogether. Ei was the third-best-selling album of 2003 in Finland and, with sales of over 120,000 copies to date, has received a quadruple-platinum certification in the country. Ei ranks also 38th on the list of the best-selling albums of all time in Finland.
"Ei" is a song by Finnish pop rock singer-songwriter Maija Vilkkumaa. Released by Warner Music Finland in 2003, it was the B-side to her lead single "Häviän" (I Vanish) from her third studio album Ei, along with the other B-side "Ilosanoma" (Gospel). Written by Vilkkumaa, the song peaked at number three on its debut week on the Finnish Singles Chart and charted for five weeks.