Hey Teodor, It works!! I use the CHARACTER_ENCODING exporter parameter in this way: JRCsvExporter exporter = new JRCsvExporter(); exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, bytesExcel); exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint); exporter.setParameter(JRCsvExporterParameter.FIELD_DELIMITER, ";"); exporter.setParameter(JRExporterParameter.CHARACTER_ENCODING,"ISO-8859-1"); exporter.exportReport(); Thanks! Santi