E-business is entering its mature stage. E-business in large companies has been researched in several surveys, whereas SMEs and micro companies have been researched less often. Micro companies are, together with SMEs, a critical part of national economies worldwide; both are central to the EU’s development strategies. It is well known that, in an information society, business models are driven by e-business concepts, and e-business models are emerging. An in-depth understanding of e-business use in micro companies is crucial for the success of such companies. The main purpose of this paper is to research the intensity of e-business use, advantages and disadvantages of e-business, the biggest problems of e-business implementation/maintenance, and attitude toward trends of e-business in micro companies. The paper presents findings from a survey carried out on a sample of micro companies. Data were collected via an e-questionnaire, and results were calculated using SPSS. The data confirmed that e-business in micro companies is most often used in connection with e-banking; e-business with the government also appears to be very important. E-poslovanje vstopa v svojo zrelo fazo. Področje e-poslovanja v velikih podjetjih je bilo raziskano v številnih raziskavah, po drugi strani pa je zelo malo raziskav, ki obravnavajo njegovo delovanje v malih, srednje velikih in mikro podjetjih. Mikro podjetja so skupaj z malimi in srednje velikimi podjetji zelo pomemben del nacionalnih gospodarstev v svetu in imajo tudi osrednji pomen za razvoj strategij Evropske unije. Znano je, da so koncepti e-poslovanja v informacijski družbi vodilo za razvoj poslovnih modelov, vse bolj pa se pojavljajo tudi modeli e-poslovanja. V bistvu je razumevanje uporabe e-poslovanja v mikro podjetjih ključnega pomena za njihov uspeh. Glavni namen prispevka je raziskati intenzivnost uporabe e-poslovanja, njegove prednosti in slabosti, največje težave pri implementaciji/vzdrževanju ter odnos do trendov v e-poslovanju v mikro podjetjih. V glavnem delu prispevka bodo predstavljene ugotovitve na podlagi raziskave, ki je bila izvedena v mikro podjetjih. Podatki so bili zbrani z elektronskim vprašalnikom, rezultati pa izračunani s programom SPSS. Raziskava je potrdila, da se e-poslovanje v mikro podjetjih najpogosteje uporablja v povezavi z e-bančništvom, zelo pomembno pa postaja tudi e-poslovanje z vlado (Business to Government - B2G).