TECHNOLOGY FOCUS - ELECTRONICS - Preferred Component: The electroconductive component further has a soluble protective layer containing a water-soluble polymer at least on the electroconductive layer, and a middle layer (30). The electroconductive layer contains conductive region and non-conductive region. Preferred Property: The electroconductive layer has surface resistance of 1-1000 ohms/square or less.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The polymeric compound (C) is non-photosensitive compound, preferably compound which forms sol-gel cured material. Preferred Property: The compound (B) has molecular weight of 140-5000.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The electroconductive composition further contains polymeric compound (C) which forms a matrix, and compound (D) chosen from compound of formula: R41-P(-R42)-OR43 (IV) or R51-S-R52 (V) and compound of formula (VI)-(IX). The mass ratio of polymeric compound (C) with respect to metal conductive fiber (A) is 0.001/1-100/1. The content of compound (B) is 0.005-50 mmol or less per g metal conductive fiber (A).R41,R42=alkyl, aryl, alkoxy, aryloxy or halo;R43=alkyl or aryl;R51,R52=alkyl group, where R51 and R52 connect through organic group having valence of 2 or more or single bond;V61,V71,V81,V91=H or substituent;andR71,R72,R81,R82,R91-R93=H or group substitutable by N.(i) At least 2 of R41-R43 combine through organic group having valence of 2 or more, or single bond; (ii) Structure in which monovalent group obtained by removing one H from at least one of R41-R43 is connected with at least one of R41-R43 through organic group having valence of 2 or more or single bond contains two or more compounds in one molecule; and (iii) Structure in which monovalent group obtained by removing one H from at least one of R51 and R52 is connected with at least one of R51 and R52 through organic group having valence of 2 or more or single bond contains two or more compounds in one molecule. The metal conductive fiber (A) contains 50-100 mol% silver. Preferred Property: The metal conductive fiber (A) has average short-axis length of 1-30 nm