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integer of from 1 to 5; mis an integer of from 1 to 5; nl is an integer of from 1 to 5; m +nl =6; 

wherein, R:t4 and Rf’ are the same or different and each is a fluorine-containing alkyl group having 1 to 10 carbon atoms or a fluorine-containing alkyl group which has 1 to 10 carbon atoms and ether bond; Y is the same or different and each is H, F, Cl, an alky 1 group having 1 to 10 carbon atoms or a fluorine› containing alkyl group which has 1 to 10 carbon atoms and may have ether bond; R is the same or different and each is H or an alkyl group having 1 to 10 carbon atoms; n is 0 or an integer of from 1 to 5; 

wherein, R:t4 and Rf’ are the same or different and each is a fluorine-containing alkyl group having 1 to 10 carbon atoms or a fluorine-containing alkyl group which has 1 to 10 carbon atoms and ether bond; Y is the same or different and each is H, F, Cl, an alky 1 group having 1 to 10 carbon atoms or a fluorine› containing alkyl group which has 1 to 10 carbon atoms and may have ether bond; R is the same or different and each is H or an alkyl group having 1 to 10 carbon atoms; n is 0 or an integer of from 1 to 5; and 

wherein R:t4 and Rf’ are the same or different and each is a fluorine-containing alkyl group having 1 to 10 carbon atoms or a fluorine-containing alkyl group which has 1 to 10 carbon atoms and ether bond; Y 1 , Y $^{2 }$and Y$^{3 }$are the same or different and each is H, F, Cl, an alkyl group having 1 to 10 carbon atoms or a fluorine-containing alkyl group which has 1 to 10 carbon atoms and may have ether bond; R is the same or different and each is H or an alky 1 group having 1 to 10 carbon atoms; n is 0 or an integer of from 1 to 5; at least one ofY1, Y 2 

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andY $^{3 }$is Fora fluorine-containing alkyl group which has 1 to 10 carbon atoms and may have ether bond; 

M2, in its monomeric form, is a fluorine-containing ethyl› enic monomer having 2 or 3 carbon atoms and at least one fluorine atom; and 

(10) 

N, in its monomeric form, is an ethylenically unsaturated monomer copolymerizable with Ml and M2, and the structural units Ml, M2 and N are contained in amounts of from 1 to 99% by mole, from 1 to 99% by mole and from 0 to 98% by mole, respectively. 

2. The fluorine-containing polymer of claim 1, wherein in the formula (13), provided that (Ml)+(M2) is 100% by mole, a percent by mole ratio of Ml/M2 is 30/70 to 70/30. 

3. A fluorine-containing polymer having a number average molecular weight of from 500 to 1,000,000 which has a ring structure in the polymer trunk chain and is represented by the formula (13 )-1: 

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wherein 

Ml-1, in its monomeric form, is at least one monomer selected from the norbomene compounds having a fluo› rine-containing alcohol structure represented by the for› mulae (8) to (12); 

(11) 

wherein Z 4 is the same or different and each is: 

wherein, R:t4 is the same or different and each is a fluorine› containing alkyl group having 1 to 10 carbon atoms or a fluorine-containing alkyl group which has 1 to 10 carbon atoms and ether bond; R $^{3 }$is H or a hydrocarbon group having 1 to 10 carbon atoms; Y is the same or different and each is H, F, Cl, an alkyl group having 1 to 10 carbon atoms or a fluorine› containing alkyl group which has 1 to 10 carbon atoms and may have ether bond; R is the same or different and each is H or an alkyl group having 1 to 10 carbon atoms; n is 0 or an integer of from 1 to 5; mis an integer of from 1 to 5; nl is an integer of from Ito 5; m + nl =6; 

(12) 

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(8) 

(9) 

