The invention provides a transition metal complex of formula (3) below: ##STR00001## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are the same or different and each independently represents a hydrogen atom, a halogen atom or a substituted or unsubstituted alkyl group having 1 to 10 carbon atom(s); R.sup.5 represents a hydrogen atom, a fluorine atom or a substituted or unsubstituted alkyl group having 1 to 10 carbon atom(s); X.sup.1 represents a hydrogen atom, a halogen atom or a substituted or unsubstituted alkyl group having 1 to 10 carbon atom(s); L represents a balancing counter ion or neutral ligand similar to X.sup.1 that is bonding or coordinating to metal M; and q represents an integer of 0 or 1, and G.sup.20 represents any one of G.sup.21 to G.sup.26 below: ##STR00002## where A.sup.1 represents an element of Group 15 of the periodic table, wherein A.sup.1 in G.sup.23 represents an anion of an element of Group 15 of the periodic table, and A.sup.1 in G.sup.21 represents a nitrogen atom; R.sup.9, R.sup.14, R.sup.12, R.sup.13, R.sup.19, R.sup.20, R.sup.10, R.sup.11, R.sup.15, R.sup.16, R.sup.17, R.sup.18, R.sup.19, R.sup.20, R.sup.21 and R.sup.22 each independently represents, a hydrogen atom; or a substituted or unsubstituted alkyl groups having 1 to 10 carbon atom(s), and the line linking M and R.sup.20 represents that M is coordinated or linked to an element of Group 15 or 16 of the periodic table or to a fluorine atom constituting R.sup.20.