diff --git a/eyed3/id3/tag.py b/eyed3/id3/tag.py
index 5222d94c..18a9e8fc 100644
--- a/eyed3/id3/tag.py
+++ b/eyed3/id3/tag.py
@@ -5,7 +5,7 @@
 import tempfile
 import textwrap
 
-from ..utils import requireUnicode, chunkCopy, datePicker, b
+from ..utils import requireUnicode, requireBytes, chunkCopy, datePicker, b
 from .. import core
 from ..core import TXXX_ALBUM_TYPE, TXXX_ARTIST_ORIGIN, ALBUM_TYPE_IDS, ArtistOrigin
 from .. import Error
@@ -1814,11 +1814,32 @@ def get(self, email):
 
 class ChaptersAccessor(AccessorBase):
     def __init__(self, fs):
+        self._next_id = 0
+
         def match_func(frame, element_id):
             return frame.element_id == element_id
         super().__init__(frames.CHAPTER_FID, fs, match_func)
 
-    def set(self, element_id, times, offsets=(None, None), sub_frames=None):
+    @property
+    def chapter_ids(self):
+        return tuple([chap.element_id for chap in self])
+
+    @property
+    def next_chapter_id(self):
+        curr_ids = self.chapter_ids
+        next_id = None
+
+        while not next_id:
+            self._next_id += 1
+            chap_id = f"ch{self._next_id}".encode("latin1")
+
+            if chap_id not in curr_ids:
+                next_id = chap_id
+
+        return next_id
+
+    @requireBytes(1, "element_id")
+    def set(self, element_id: bytes, times: tuple, offsets: tuple = (None, None), sub_frames=None):
         flist = self._fs[frames.CHAPTER_FID] or []
         for chap in flist:
             if chap.element_id == element_id:
diff --git a/eyed3/plugins/classic.py b/eyed3/plugins/classic.py
index 0de57675..1df135a2 100644
--- a/eyed3/plugins/classic.py
+++ b/eyed3/plugins/classic.py
@@ -10,7 +10,7 @@
 from eyed3.utils.console import (
     printMsg, printError, printWarning, boldText, getTtySize,
 )
-from eyed3.id3.frames import ImageFrame
+from eyed3.id3.frames import ImageFrame, StartEndTuple
 from eyed3.mimetype import guessMimetype
 
 from eyed3.utils.log import getLogger
@@ -162,6 +162,14 @@ def CommentArg(arg):
             lang = vals[2] if len(vals) > 2 else id3.DEFAULT_LANG
             return text, desc, b(lang)[:3]
 
+        def ChapterArg(arg):
+            try:
+                start, end, title = _splitArgs(arg)
+            except Exception:
+                raise ValueError("Invalid chapter argument")
+
+            return int(start), int(end), title
+
         def LyricsArg(arg):
             text, desc, lang = CommentArg(arg)
             try:
@@ -330,6 +338,11 @@ def PopularityArg(arg):
                           dest="remove_all_comments",
                           help=ARGS_HELP["--remove-all-comments"])
 
+        # chapters
+        gid3.add_argument("--add-chapter", action="append", dest="chapters",
+                          metavar="START:END:TITLE", default=[],
+                          type=ChapterArg, help=ARGS_HELP["--add-chapter"])
+
         gid3.add_argument("--add-lyrics", action="append", type=LyricsArg,
                           dest="lyrics", default=[],
                           metavar="LYRICS_FILE[:DESCRIPTION[:LANG]]",
@@ -711,6 +724,13 @@ def printTag(self, tag):
                 printMsg("\nTerms of Use (%s): %s" % (boldText("USER"),
                                                       tag.terms_of_use))
 
+            # CHAP
+            if tag.chapters is not None:
+                for chapter in tag.chapters:
+                    printMsg(f"[{boldText('Chapter:')} {chapter.element_id} "
+                             f"Start time: {chapter.times.start} End time: {chapter.times.end}, "
+                             f"Title: {chapter.title}]")
+
             # --verbose
             if self.args.verbose:
                 printMsg(self._getHardRule(self.terminal_width))
@@ -906,6 +926,15 @@ def _checkNumberedArgTuples(curr, new):
                 accessor.set(text, desc, b(lang))
                 retval = True
 
+        # --add-chapter
+        for index, (start, end, title) in enumerate(self.args.chapters, 1):
+            elem_id = tag.chapters.next_chapter_id
+            printWarning(f"Setting chapter '{title}': {start:d} {end:d}")
+            tag.chapters.set(element_id=elem_id, times=StartEndTuple(start, end))
+            chapter = tag.chapters.get(elem_id)
+            chapter.title = title
+            retval = True
+
         # --play-count
         playcount_arg = self.args.play_count
         if playcount_arg:
@@ -1106,6 +1135,15 @@ def _getTemplateKeys():
         "--write-images": "Causes all attached images (APIC frames) to be "
                           "written to the specified directory.",
 
+        # chapters
+        "--add-chapter":
+          "Add a chapter. There may be more than one chapter in a "
+          "tag, as long as the START and END values are unique. "
+          "Start and end times is milliseconds offset from start. "
+          "End as well as TITLE are optional. If TITLE should be "
+          "given without END, use 4294967295 for END",
+
+
         "--add-object": "Add or replace an object. There may be more than one "
                         "object in a tag, as long as the DESCRIPTION values "
                         "are unique. The default DESCRIPTION is ''.",