| Austria: | G. Staudinger (1982 - 1991) |
| Belgium: | M. Bruxelmane (since 1978)
S. Lefebvre (1978 - 1990) G.V. Baron (1990 - 1993) |
| Bulgaria: | S.D. Vlaev (since 1994) |
| Czechoslovakia: (since 1993 the Czech Republic) |
J. Skrivanek (1978 - 1987)
I. Fort (since 1978) J. Kvasnicka (1978 - 1992) P. Ditl (since 1987) |
| Finland: | P. Lehtola (1982 - 1985)
J. Sderman (since 1985) |
| France: | J.P. Couderc (1980 - 1989)
J. Bertrand (since 1990) J.M. Desiré (1992 - 1998) C. Mathieu (since 1996) J. Villermaux (honorary member, 1995 - 1997) |
| Germany: | J. Pawlowski (1978 - 1985)
M. Zlokarnik (1978 - 1984) A. Mersmann (1980 - 1997) K. Kipke (1985 - 1991) F. Liepe (1995 - 1998) M. Kraume (since 1999) R. Geisler (since 2000) |
| Great Britain: | J. Middleton (1978 - 1986)
A. Nienow (1982 - 1990) J. Carpenter (1989 - 1997) R. Mann (1990 - 1996) J.M. Smith (1995 - 2001) G. Özcan-Taskin (since 2001) Prof. M. Yianneskis (since 2001) |
| Hungary: | J. Gyenis (1991 - 2001)
A. Ujhidy (since 2001) |
| Israel: | D. Wolf (standing guest since 1989)
L. Braginski (standing guest since 1999) |
| Italy: | G. Baldi (since 1981)
F. Magelli (since 1981) |
| Japan: | Y. Nagase (overseas member, 1990 - 1992)
K. Takahashi (standing guest since 1992) |
| Latvia: | U. Viesturs (since 1990) |
| Netherlands: | J.M. Smith (1978 - 1987)
R.M. Voncken (1978 - 1985) L.L. van Dierendonck (1986 - 1998) H.E.A. van den Akker (since 1990) |
| Poland: | F. Strek (1979 - 2000)
J. Baldyga (since 2001) |
| Russia: | V.M. Barabash (since 1993)
N. N. Kulov (standing guest since 1993) |
| Sweden: | A. Rasmuson (since 1995) |
| Switzerland: | J.R. Bourne (1978 - 1994)
W. Tauscher (1978 - 1998) T. Meyer (since 1998) F. Streiff (since 1999) |
| USA: | J.Y. Oldshue (standing guest since 1987)
E.B. Nauman (standing guest since 1991) P.M. Armenante (standing guest since 1994) A. Etchels (standing guest since 1996) |
| Yugoslavia (since 1991 Slovenia): |
M. Zumer (since 1987) |