Forensic examination of objects - a special source of information about the facts in criminal proceedings. Expertise microobjects represents an algorithm research, research methods depend on the nature of the origin of microobjects and what kind of information is required of the prosecution. One important provision is mandatory compliance expertise microobjects the consistent application of methods from simple to complex, from non-destructive to the destructive. Expertise is the most important form for the application of special knowledge, because of which disposal of the prosecution and the court lies the new information that the evidential matter which cannot be obtained by other means, procedural. A substantial amount of information is provided by examining the nature of the material microobjects, studying its internal features, i.e. the expertise of biological and physico-chemical. Traseological expertise in most cases are limited to solving diagnostic tasks. A special place within the microobjects expertise is occupied by the expertise of material, substances and their products. Criminalistics fibrous products out of them-in the case of thefts with penetration, rapes, murders, car accidents, narcotic substances. The spectrum of crimes whose investigation the criminalistical expertise is applied to material, substances and their products is very wide. Results of the research expertise of the microobjects contributes to establishing the identity of the person; finding the place where the corpse was brought; determining when death has been caused; establishing whether the victim was killed before or after the fire; to determine the place and circumstances of committing crime; setting the itinerary of travel by the offender; setting the mode and mechanism of perpetrating the attack, the character and actions of all accomplices; setting the instrument committing crime.