Air pollution is one of the main environmental problems. Health consequences of smog exposure apply in particular to people who spend a lot of time outdoors, including cyclists. The aim of the work was to evaluate the occurrence of symptoms associated with air pollution among the Wroclaw cyclists. The study was conducted via an internet questionnaire. The survey group consisted of 599 respondents - Wrocław cyclists. While cycling or short after cycling, 83.14% of cyclists reported symptoms connected with the respiratory system (such as hoarseness, cough, sore throat pain, or dyspnoea), eyes (such as redness, dryness, watering, strain) and othersymptoms (for example, concentration deficiency, headache, fatigue), which they associated with air pollution. Problems with the eyes were the most common. There was no correlation between the frequency of symptom occurrence and the distance or cycling frequency. People who chose low-traffic routes were less likely to suffer from cough, hoarseness, or dyspnoea than people who chose high-traffic routes. Only 9.8% of the respondents used protection measures such as masks. Choosing a proper route and avoiding high-traffic seem to be crucial when it comes to symptom occurrence, and perhaps also to long-term health effects. City councils should plan cycling routes in low-traffic areas to minimize negative smog effects. Protection measures, such as the use of masks, should also be more actively promoted.